Arg.mrs_data            Apply Arg operator to an MRS dataset.
Conj.mrs_data           Apply Conj operator to an MRS dataset.
Im.mrs_data             Apply Im operator to an MRS dataset.
Mod.mrs_data            Apply Mod operator to an MRS dataset.
Ncoils                  Return the total number of coil elements in an
                        MRS dataset.
Ndyns                   Return the total number of dynamic scans in an
                        MRS dataset.
Npts                    Return the number of data points in an MRS
                        dataset.
Nspec                   Return the total number of spectra in an MRS
                        dataset.
Nx                      Return the total number of x locations in an
                        MRS dataset.
Ny                      Return the total number of y locations in an
                        MRS dataset.
Nz                      Return the total number of z locations in an
                        MRS dataset.
Re.mrs_data             Apply Re operator to an MRS dataset.
abfit_opts              Return a list of options for an ABfit analysis.
acquire                 Simulate pulse sequence acquisition.
align                   Align spectra to a reference frequency using a
                        convolution based method.
apodise_xy              Apodise MRSI data in the x-y direction with a
                        k-space hamming filter.
append_basis            Combine a pair of basis set objects.
append_coils            Append MRS data across the coil dimension,
                        assumes they matched across the other
                        dimensions.
append_dyns             Append MRS data across the dynamic dimension,
                        assumes they matched across the other
                        dimensions.
apply_axes              Apply a function over specified array axes.
apply_mrs               Apply a function across given dimensions of a
                        MRS data object.
apply_pvc               Convert default LCM/TARQUIN concentration
                        scaling to molal units with partial volume
                        correction.
array2mrs_data          Convert a 7 dimensional array in into a
                        mrs_data object. The array dimensions should be
                        ordered as : dummy, X, Y, Z, dynamic, coil,
                        FID.
auto_phase              Perform zeroth-order phase correction based on
                        the minimisation of the squared difference
                        between the real and magnitude components of
                        the spectrum.
back_extrap             Back extrapolate time-domain points using the
                        Burg autoregressive model
basis2mrs_data          Convert a basis object to an mrs_data object -
                        where basis signals are spread across the
                        dynamic dimension.
bbase                   Generate a spline basis, slightly adapted from
                        : "Splines, knots, and penalties", Eilers 2010.
bc_als                  Baseline correction using the ALS method.
bc_constant             Remove a constant baseline offset based on a
                        reference spectral region.
beta2lw                 Covert a beta value in the time-domain to an
                        equivalent linewidth in Hz: x * exp(-i * t * t
                        * beta).
calc_coil_noise_cor     Calculate the noise correlation between coil
                        elements.
calc_coil_noise_sd      Calculate the noise standard deviation for each
                        coil element.
calc_ed_from_lambda     Calculate the effective dimensions of a spline
                        smoother from lambda.
calc_peak_info_vec      Calculate the FWHM of a peak from a vector of
                        intensity values.
calc_sd_poly            Perform a polynomial fit, subtract and return
                        the standard deviation of the residuals.
calc_spec_diff          Calculate the sum of squares differences
                        between two mrs_data objects.
calc_spec_snr           Calculate the spectral SNR.
check_lcm               Check LCModel can be run
check_tqn               Check the TARQUIN binary can be run
collapse_to_dyns        Collapse MRS data by concatenating spectra
                        along the dynamic dimension.
comb_coils              Combine coil data based on the first data point
                        of a reference signal.
comb_coils_fp_pc        Combine coil data following phase correction
                        based on the first data point in the FID.
comb_csv_results        Combine the results from multiple csv format
                        files into a table.
comb_fits               Combine a list of fit_result objects into a
                        single fit object containing a dynamic series.
comb_metab_ref          Combine a reference and metabolite mrs_data
                        object.
conv_mrs                Convolve two MRS data objects.
crop_spec               Crop 'mrs_data' object based on a frequency
                        range.
crop_td_pts             Crop 'mrs_data' object data points in the
                        time-domain.
crop_xy                 Crop an MRSI dataset in the x-y direction
crossprod_3d            Compute the vector cross product between
                        vectors x and y. Adapted from
                        http://stackoverflow.com/questions/15162741/what-is-rs-crossproduct-function
decimate_mrs            Decimate an MRS signal by a factor.
def_N                   Return the default number of data points in the
                        spectral dimension.
def_acq_paras           Return (and optionally modify using the input
                        arguments) a list of the default acquisition
                        parameters.
def_fs                  Return the default sampling frequency in Hz.
def_ft                  Return the default transmitter frequency in Hz.
def_nuc                 Return the default nucleus.
def_ref                 Return the default reference value for ppm
                        scale.
diff_mrs                Apply the diff operator to an MRS dataset in
                        the FID/spectral dimension.
downsample_mrs          Downsample an MRS signal by a factor of 2 using
                        an FFT "brick-wall" filter.
ecc                     Eddy current correction.
est_noise_sd            Estimate the standard deviation of the noise
                        from a segment of an mrs_data object.
fd2td                   Transform frequency-domain data to the
                        time-domain.
fd_conv_filt            Frequency-domain convolution based filter.
fit_amps                Extract the fit amplitudes from an object of
                        class 'fit_result'.
fit_diags               Calculate diagnostic information for object of
                        class 'fit_result'.
fit_mrs                 Perform a fit based analysis of MRS data.
fit_res2csv             Write fit results table to a csv file.
fp_phase                Return the phase of the first data point in the
                        time-domain.
fp_phase_correct        Perform a zeroth order phase correction based
                        on the phase of the first data point in the
                        time-domain.
fs                      Return the sampling frequency in Hz of an MRS
                        dataset.
ft_shift                Perform a fft and ffshift on a vector.
ft_shift_mat            Perform a fft and fftshift on a matrix with
                        each column replaced by its shifted fft.
gen_F                   Generate the F product operator.
gen_F_xy                Generate the Fxy product operator with a
                        specified phase.
get_1h_brain_basis_paras
                        Return a list of 'mol_parameter' objects
                        suitable for 1H brain MRS analyses.
get_1h_brain_basis_paras_v1
                        Return a list of 'mol_parameter' objects
                        suitable for 1H brain MRS analyses.
get_1h_brain_basis_paras_v2
                        Return a list of 'mol_parameter' objects
                        suitable for 1H brain MRS analyses.
get_1h_brain_basis_paras_v3
                        Return a list of 'mol_parameter' objects
                        suitable for 1H brain MRS analyses.
get_2d_psf              Get the point spread function (PSF) for a 2D
                        phase encoded MRSI scan.
get_acq_paras           Return acquisition parameters from a MRS data
                        object.
get_dyns                Extract a subset of dynamic scans.
get_even_dyns           Return even numbered dynamic scans starting
                        from 1 (2,4,6...).
get_fh_dyns             Return the first half of a dynamic series.
get_fit_map             Get a data array from a fit result.
get_fit_table           Combine all fitting data points into a single
                        dataframe.
get_fp                  Return the first time-domain data point.
get_guassian_pulse      Generate a gaussian pulse shape.
get_metab               Extract the metabolite component from an
                        mrs_data object.
get_mol_names           Return a character array of names that may be
                        used with the 'get_mol_paras' function.
get_mol_paras           Get a 'mol_parameters' object for a named
                        molecule.
get_mrsi2d_seg          Calculate the partial volume estimates for each
                        voxel in a 2D MRSI dataset.
get_mrsi_voi            Generate a MRSI VOI from an 'mrs_data' object.
get_mrsi_voxel          Generate a MRSI voxel from an 'mrs_data'
                        object.
get_mrsi_voxel_xy_psf   Generate a MRSI voxel PSF from an 'mrs_data'
                        object.
get_odd_dyns            Return odd numbered dynamic scans starting from
                        1 (1,3,5...).
get_ref                 Extract the reference component from an
                        mrs_data object.
get_seg_ind             Get the indices of data points lying between
                        two values (end > x > start).
get_sh_dyns             Return the second half of a dynamic series.
get_slice               Return a single slice from a larger MRSI
                        dataset.
get_subset              Extract a subset of MRS data.
get_svs_voi             Generate a SVS acquisition volume from an
                        'mrs_data' object.
get_td_amp              Return an array of amplitudes derived from
                        fitting the initial points in the time domain
                        and extrapolating back to t=0.
get_uncoupled_mol       Generate a 'mol_parameters' object for a simple
                        spin system with one resonance.
get_voi_cog             Calculate the centre of gravity for an image
                        containing 0 and 1's.
get_voi_seg             Return the white matter, gray matter and CSF
                        composition of a volume.
get_voi_seg_psf         Return the white matter, gray matter and CSF
                        composition of a volume.
get_voxel               Return a single voxel from a larger mrs
                        dataset.
grid_shift_xy           Grid shift MRSI data in the x/y dimension.
hsvd_filt               HSVD based signal filter.
hz                      Return the frequency scale of an MRS dataset in
                        Hz.
ift_shift               Perform an iffshift and ifft on a vector.
ift_shift_mat           Perform an ifft and ifftshift on a matrix with
                        each column replaced by its shifted ifft.
image.mrs_data          Image plot method for objects of class
                        mrs_data.
int_spec                Integrate a spectral region.
interleave_dyns         Interleave the first and second half of a
                        dynamic series.
inv_even_dyns           Invert even numbered dynamic scans starting
                        from 1 (2,4,6...).
inv_odd_dyns            Invert odd numbered dynamic scans starting from
                        1 (1,3,5...).
is_fd                   Check if the chemical shift dimension of an MRS
                        data object is in the frequency domain.
l2_reg                  Perform l2 regularisation artefact suppression
                        using the method proposed by Bilgic et al. JMRI
                        40(1):181-91 2014.
lb                      Apply line-broadening (apodisation) to MRS data
                        or basis object.
lw2alpha                Covert a linewidth in Hz to an equivalent alpha
                        value in the time-domain ie: x * exp(-t *
                        alpha).
lw2beta                 Covert a linewidth in Hz to an equivalent beta
                        value in the time-domain ie: x * exp(-t * t *
                        beta).
mask_xy                 Mask an MRSI dataset in the x-y direction
mask_xy_mat             Mask a 2D MRSI dataset in the x-y dimension.
mat2mrs_data            Convert a matrix (with spectral points in the
                        row dimension and dynamics in the column
                        dimensions) into a mrs_data object.
max_mrs                 Apply the max operator to an MRS dataset.
max_mrs_interp          Apply the max operator to an interpolated MRS
                        dataset.
mean.mrs_data           Calculate the mean spectrum from an mrs_data
                        object.
mean_dyn_blocks         Calculate the mean of adjacent dynamic scans.
mean_dyn_pairs          Calculate the pairwise means across a dynamic
                        data set.
mean_dyns               Calculate the mean dynamic data.
median_dyns             Calculate the median dynamic data.
mrs_data2basis          Convert an mrs_data object to basis object -
                        where basis signals are spread across the
                        dynamic dimension in the MRS data.
mrs_data2mat            Convert mrs_data object to a matrix, with
                        spectral points in the column dimension and
                        dynamics in the row dimension.
mrs_data2vec            Convert mrs_data object to a vector.
mrsi2d_img2kspace       Transform 2D MRSI data to k-space in the x-y
                        direction.
mrsi2d_kspace2img       Transform 2D MRSI data from k-space to image
                        space in the x-y direction.
mvfftshift              Perform a fftshift on a matrix, with each
                        column replaced by its shifted result.
mvifftshift             Perform an ifftshift on a matrix, with each
                        column replaced by its shifted result.
n2coord                 Print fit coordinates from a single index.
nifti_flip_lr           Flip the x data dimension order of a nifti
                        image. This corresponds to flipping MRI data in
                        the left-right direction, assuming the data in
                        save in neurological format (can check with
                        fslorient program).
norm_mrs                Normalise mrs_data to a spectral region.
ortho3                  Display an orthographic projection plot of a
                        nifti object.
ortho3_int              Display an interactive orthographic projection
                        plot of a nifti object.
peak_info               Search for the highest peak in a spectral
                        region and return the frequency, height and
                        FWHM.
phase                   Apply phasing parameters to MRS data.
plot.fit_result         Plot the fitting results of an object of class
                        'fit_result'.
plot.mrs_data           Plotting method for objects of class mrs_data.
plot_bc                 Convenience function to plot a baseline
                        estimate with the original data.
plot_slice_fit          Plot a 2D slice from an MRSI fit result object.
plot_slice_fit_inter    Plot a 2D slice from an MRSI fit result object.
plot_slice_map          Plot a slice from a 7 dimensional array.
plot_slice_map_inter    Plot an interactive slice map from a data array
                        where voxels can be selected to display a
                        corresponding spectrum.
plot_voi_overlay        Plot a volume as an image overlay.
plot_voi_overlay_seg    Plot a volume as an overlay on a segmented
                        brain volume.
ppm                     Return the ppm scale of an MRS dataset or fit
                        result.
print.fit_result        Print a summary of an object of class
                        'fit_result'.
print.mrs_data          Print a summary of mrs_data parameters.
qn_states               Get the quantum coherence matrix for a spin
                        system.
rats                    Robust Alignment to a Target Spectrum (RATS).
re_weighting            Apply a weighting to the FID to enhance
                        spectral resolution.
read_basis              Read a basis file in LCModel .basis format.
read_ima_coil_dir       Read a directory containing Siemens MRS IMA
                        files and combine along the coil dimension.
                        Note that the coil ID is inferred from the
                        sorted file name and should be checked when
                        consistency is required between two
                        directories.
read_ima_dyn_dir        Read a directory containing Siemens MRS IMA
                        files and combine along the dynamic dimension.
                        Note that the coil ID is inferred from the
                        sorted file name and should be checked when
                        consistency is required.
read_lcm_coord          Read an LCModel formatted coord file containing
                        fit information.
read_mrs                Read MRS data from a file.
read_mrs_dpt            Read MRS data stored in dangerplot (dpt) v3
                        format.
read_mrs_tqn            Read MRS data using the TARQUIN software
                        package.
read_siemens_txt_hdr    Read the text format header found in Siemens
                        IMA and TWIW data files.
read_tqn_fit            Reader for csv fit results generated by
                        TARQUIN.
read_tqn_result         Reader for csv results generated by TARQUIN.
rep_array_dim           Repeat an array over a given dimension.
rep_dyn                 Replicate a scan in the dynamic dimension.
rep_mrs                 Replicate a scan over a given dimension.
resample_img            Resample an image to match a target image
                        space.
resample_voi            Resample a VOI to match a target image space
                        using nearest-neighbour interpolation.
reslice_to_mrs          Reslice a nifti object to match the orientation
                        of mrs data.
rm_dyns                 Remove a subset of dynamic scans.
scale_amp_molal_pvc     Apply partial volume correction to a fitting
                        result object.
scale_amp_molar         Apply water reference scaling to a fitting
                        results object to yield metabolite quantities
                        in millimolar (mM) units (mol/litre).
scale_amp_ratio         Scale fitted amplitudes to a ratio of signal
                        amplitude.
scale_amp_water_ratio   Scale metabolite amplitudes as a ratio to the
                        unsuppressed water amplitude.
sd                      Calculate the standard deviation spectrum from
                        an mrs_data object.
sd.mrs_data             Calculate the standard deviation spectrum from
                        an mrs_data object.
seconds                 Return a time scale vector to match the FID of
                        an MRS data object.
seq_cpmg_ideal          CPMG style sequence with ideal pulses.
seq_mega_press_ideal    MEGA-PRESS sequence with ideal localisation
                        pulses and Gaussian shaped editing pulse.
seq_press_ideal         PRESS sequence with ideal pulses.
seq_pulse_acquire       Simple pulse and acquire sequence with ideal
                        pulses.
seq_pulse_acquire_31p   Simple pulse and acquire sequence with ideal
                        pulses.
seq_slaser_ideal        sLASER sequence with ideal pulses.
seq_spin_echo_ideal     Spin echo sequence with ideal pulses.
seq_spin_echo_ideal_31p
                        Spin echo sequence with ideal pulses.
seq_steam_ideal         STEAM sequence with ideal pulses.
set_def_acq_paras       Set the default acquisition parameters.
set_lcm_cmd             Set the command to run the LCModel command-line
                        program.
set_lw                  Apply line-broadening to an mrs_data object to
                        achieve a specified linewidth.
set_ref                 Set the ppm reference value (eg ppm value at
                        0Hz).
set_td_pts              Set the number of time-domain data points,
                        truncating or zero-filling as appropriate.
set_tqn_cmd             Set the command to run the TARQUIN command-line
                        program.
shift                   Apply a frequency shift to MRS data.
sim_basis               Simulate a basis set object.
sim_basis_1h_brain      Simulate a basis-set suitable for 1H brain MRS
                        analysis acquired with a PRESS sequence. Note,
                        ideal pulses are assumed.
sim_basis_1h_brain_press
                        Simulate a basis-set suitable for 1H brain MRS
                        analysis acquired with a PRESS sequence. Note,
                        ideal pulses are assumed.
sim_basis_tqn           Simulate a basis file using TARQUIN.
sim_brain_1h            Simulate MRS data with a similar appearance to
                        normal brain (by default).
sim_mol                 Simulate a 'mol_parameter' object.
sim_noise               Simulate a time-domain mrs_data object
                        containing simulated Gaussian noise.
sim_resonances          Simulate a MRS data object containing a set of
                        simulated resonances.
spant-package           spant: spectroscopy analysis tools.
spant_mpress_drift      Example MEGA-PRESS data with significant B0
                        drift.
spin_sys                Create a spin system object for pulse sequence
                        simulation.
spm_pve2categorical     Convert SPM style segmentation files to a
                        single categorical image where the numerical
                        values map as: 0) Other, 1) CSF, 2) GM and 3)
                        WM.
stackplot               Produce a plot with multiple traces.
stackplot.fit_result    Plot the fitting results of an object of class
                        'fit_result' with individual basis set
                        components shown.
stackplot.mrs_data      Stackplot plotting method for objects of class
                        mrs_data.
sum_coils               Calculate the sum across receiver coil
                        elements.
sum_dyns                Calculate the sum of data dynamics.
td2fd                   Transform time-domain data to the
                        frequency-domain.
td_conv_filt            Time-domain convolution based filter.
tdsr                    Time-domain spectral registration.
varpro_3_para_opts      Return a list of options for VARPRO based
                        fitting with 3 free parameters:  zero'th order
                        phase correction  global damping  global
                        frequency shift.
varpro_opts             Return a list of options for VARPRO based
                        fitting.
vec2mrs_data            Convert a vector into a mrs_data object.
write_basis             Write a basis object to an LCModel .basis
                        formatted file.
write_basis_tqn         Generate a basis file using TARQUIN.
write_mrs               Write MRS data object to file.
write_mrs_nifti         Write MRS data object to file in NIFTI format.
zero_nzoc               Zero all non-zero-order coherences.
zf                      Zero-fill MRS data in the time domain.
zf_xy                   Zero-fill MRSI data in the k-space x-y
                        direction.
