# vectorstats¶

## Synopsis¶

Statistical testing of vector data using non-parametric permutation testing

## Usage¶

vectorstats [ options ]  input design contrast output

• input: a text file listing the file names of the input subject data
• design: the design matrix. Note that a column of 1’s will need to be added for correlations.
• contrast: the contrast vector, specified as a single row of weights
• output: the filename prefix for all output.

## Options¶

### Options for permutation testing¶

• -notest don’t perform permutation testing and only output population statistics (effect size, stdev etc)
• -nperms num the number of permutations (Default: 5000)
• -permutations file manually define the permutations (relabelling). The input should be a text file defining a m x n matrix, where each relabelling is defined as a column vector of size m, and the number of columns, n, defines the number of permutations. Can be generated with the palm_quickperms function in PALM (http://fsl.fmrib.ox.ac.uk/fsl/fslwiki/PALM). Overrides the nperms option.

### Standard options¶

• -info display information messages.
• -quiet do not display information messages or progress status; alternatively, this can be achieved by setting the MRTRIX_QUIET environment variable to a non-empty string.
• -debug display debugging messages.
• -force force overwrite of output files (caution: using the same file as input and output might cause unexpected behaviour).