NF: AFNI 3dNetCorr as afni.NetCorr

nipype/interfaces/afni/__init__.py

@@ -29,6 +29,7 @@
     LFCD,
     Maskave,
     Means,
+    NetCorr,
     OutlierCount,
     QualityIndex,
     ROIStats,

nipype/interfaces/afni/preprocess.py

@@ -2556,6 +2556,181 @@ def _format_arg(self, name, trait_spec, value):
             return super(TCorrMap, self)._format_arg(name, trait_spec, value)
 
 
+class NetCorrInputSpec(AFNICommandInputSpec):
+    in_file = File(
+        desc="input time series file (4D data set)",
+        exists=True,
+        argstr="-inset %s",
+        mandatory=True)
+    in_rois = File(
+        desc="input set of ROIs, each labelled with distinct integers",
+        exists=True,
+        argstr="-in_rois %s",
+        mandatory=True)
+    mask = File(
+        desc="can include a whole brain mask within which to "
+             "calculate correlation. Otherwise, data should be "
+             "masked already",
+        exists=True,
+        argstr="-mask %s")
+    weight_ts = File(
+        desc="input a 1D file WTS of weights that will be applied "
+             "multiplicatively to each ROI's average time series. "
+             "WTS can be a column- or row-file of values, but it "
+             "must have the same length as the input time series "
+             "volume. "
+             "If the initial average time series was A[n] for "
+             "n=0,..,(N-1) time points, then applying a set of "
+             "weights W[n] of the same length from WTS would "
+             "produce a new time series:  B[n] = A[n] * W[n]",
+        exists=True,
+        argstr="-weight_ts %s")
+    fish_z = traits.Bool(
+        desc="switch to also output a matrix of Fisher Z-transform "
+             "values for the corr coefs (r): "
+             "Z = atanh(r) , "
+             "(with Z=4 being output along matrix diagonals where "
+             "r=1, as the r-to-Z conversion is ceilinged at "
+             "Z = atanh(r=0.999329) = 4, which is still *quite* a "
+             "high Pearson-r value",
+        argstr="-fish_z")
+    part_corr = traits.Bool(
+        desc="output the partial correlation matrix",
+        argstr="-part_corr")
+    ts_out = traits.Bool(
+        desc="switch to output the mean time series of the ROIs that "
+             "have been used to generate the correlation matrices. "
+             "Output filenames mirror those of the correlation "
+             "matrix files, with a '.netts' postfix",
+        argstr="-ts_out")
+    ts_label = traits.Bool(
+        desc="additional switch when using '-ts_out'. Using this "
+             "option will insert the integer ROI label at the start "
+             "of each line of the *.netts file created. Thus, for "
+             "a time series of length N, each line will have N+1 "
+             "numbers, where the first is the integer ROI label "
+             "and the subsequent N are scientific notation values",
+        argstr="-ts_label")
+    ts_indiv = traits.Bool(
+        desc="switch to create a directory for each network that "
+             "contains the average time series for each ROI in "
+             "individual files (each file has one line). "
+             "The directories are labelled PREFIX_000_INDIV/, "
+             "PREFIX_001_INDIV/, etc. (one per network). Within each "
+             "directory, the files are labelled ROI_001.netts, "
+             "ROI_002.netts, etc., with the numbers given by the "
+             "actual ROI integer labels",
+        argstr="-ts_indiv")
+    ts_wb_corr = traits.Bool(
+        desc="switch to create a set of whole brain correlation maps. "
+             "Performs whole brain correlation for each "
+             "ROI's average time series; this will automatically "
+             "create a directory for each network that contains the "
+             "set of whole brain correlation maps (Pearson 'r's). "
+             "The directories are labelled as above for '-ts_indiv' "
+             "Within each directory, the files are labelled "
+             "WB_CORR_ROI_001+orig, WB_CORR_ROI_002+orig, etc., with "
+             "the numbers given by the actual ROI integer labels",
+        argstr="-ts_wb_corr")
+    ts_wb_Z = traits.Bool(
+        desc="same as above in '-ts_wb_corr', except that the maps "
+             "have been Fisher transformed to Z-scores the relation: "
+             "Z=atanh(r). "
+             "To avoid infinities in the transform, Pearson values "
+             "are effectively capped at |r| = 0.999329 (where |Z| = 4.0). "
+             "Files are labelled WB_Z_ROI_001+orig, etc",
+        argstr="-ts_wb_Z")
+    ts_wb_strlabel = traits.Bool(
+        desc="by default, '-ts_wb_{corr,Z}' output files are named "
+             "using the int number of a given ROI, such as: "
+             "WB_Z_ROI_001+orig. "
+             "With this option, one can replace the int (such as '001') "
+             "with the string label (such as 'L-thalamus') "
+             "*if* one has a labeltable attached to the file",
+        argstr="-ts_wb_strlabel")
+    nifti = traits.Bool(
+        desc="output any correlation map files as NIFTI files "
+             "(default is BRIK/HEAD). Only useful if using "
+             "'-ts_wb_corr' and/or '-ts_wb_Z'",
+        argstr="-nifti")
+    output_mask_nonnull = traits.Bool(
+        desc="internally, this program checks for where there are "
+             "nonnull time series, because we don't like those, in "
+             "general.  With this flag, the user can output the "
+             "determined mask of non-null time series.",
+        argstr="-output_mask_nonnull")
+    push_thru_many_zeros = traits.Bool(
+        desc="by default, this program will grind to a halt and "
+             "refuse to calculate if any ROI contains >10 percent "
+             "of voxels with null times series (i.e., each point is "
+             "0), as of April, 2017.  This is because it seems most "
+             "likely that hidden badness is responsible. However, "
+             "if the user still wants to carry on the calculation "
+             "anyways, then this option will allow one to push on "
+             "through.  However, if any ROI *only* has null time "
+             "series, then the program will not calculate and the "
+             "user will really, really, really need to address their masking",
+        argstr="-push_thru_many_zeros")
+    ignore_LT = traits.Bool(
+        desc="switch to ignore any label table labels in the "
+             "'-in_rois' file, if there are any labels attached",
+        argstr="-ignore_LT")
+    out_file = File(
+        desc="output file name part",
+        name_template="%s_netcorr",
+        argstr="-prefix %s",
+        position=1,
+        name_source="in_file",
+    )
+
+class NetCorrOutputSpec(TraitedSpec):
+    out_matrix = File(desc="output text file for correlation stats")
+
+class NetCorr(AFNICommand):
+    """Calculate correlation matrix of a set of ROIs (using mean time series of
+    each). Several networks may be analyzed simultaneously, one per brick.
+
+    For complete details, see the `3dNetCorr Documentation
+    <https://afni.nimh.nih.gov/pub/dist/doc/program_help/3dNetCorr.html>`_.
+
+    Examples
+    --------
+    >>> from nipype.interfaces import afni
+    >>> ncorr = afni.NetCorr()
+    >>> ncorr.inputs.in_file = 'functional.nii'
+    >>> ncorr.inputs.mask = 'mask.nii'
+    >>> ncorr.inputs.in_rois = 'maps.nii'
+    >>> ncorr.inputs.ts_wb_corr = True
+    >>> ncorr.inputs.ts_wb_Z = True
+    >>> ncorr.inputs.fish_z = True
+    >>> ncorr.inputs.out_file = 'sub0.tp1.ncorr'
+    >>> ncorr.cmdline
+    '3dNetCorr -prefix sub0.tp1.ncorr -inset functional.nii -mask mask.nii -in_rois maps.nii -ts_wb_corr -ts_wb_Z -fish_z'
+    >>> res = ncorr.run()  # doctest: +SKIP
+
+    """
+
+    _cmd = "3dNetCorr"
+    input_spec = NetCorrInputSpec
+    output_spec = NetCorrOutputSpec
+
+    def _list_outputs(self):
+        outputs = self.output_spec().get()
+
+        if not isdefined(self.inputs.out_file):
+            prefix = self._gen_fname(self.inputs.in_file, suffix="_netcorr")
+        else:
+            prefix = self.inputs.out_file
+
+        # All outputs should be in the same directory as the prefix
+        out_dir = os.path.dirname(os.path.abspath(prefix))
+
+        outputs["out_matrix"] = (
+            fname_presuffix(prefix, suffix="_000", use_ext=False, newpath=out_dir) + ".netcc"
+        )
+        return outputs
+
+
 class TCorrelateInputSpec(AFNICommandInputSpec):
     xset = File(
         desc="input xset",