StreamPoints is an option to StreamPlot, ListStreamPlot, and related functions that determines how many streamlines to draw.
StringTake["string", n] gives a string containing the first n characters in " string". StringTake["string", -n] gives the last n characters in " string". StringTake["string", ...
TextRecognize[image] recognizes text in image and returns it as a string.
TextureCoordinateFunction is an option to Plot3D and similar functions that specifies a function that computes texture coordinates.
Thinning[image] finds the skeletons of foreground regions in image by applying morphological thinning until convergence.Thinning[image, n] performs n iterations of ...
TopHatTransform[image, ker] gives the morphological top-hat transform of image with respect to structuring element ker.TopHatTransform[image, r] gives the top-hat transform ...
TotalVariationFilter[image] iteratively reduces noise while preserving edges in image.TotalVariationFilter[image, param] assumes a regularization parameter value param.
TreeGraphQ[g] yields True if the graph g is a tree and False otherwise.
WaveletScale is an option for ContinuousWaveletTransform and related constructs used to specify the smallest resolvable scale.
WeightedGraphQ[g] yields True if the graph g is a weighted graph and False otherwise.