You can match directly against the type of v, but you need a value pattern to refer to the types to match, as a "dotless" name is a capture pattern that matches any value.
This MATLAB function returns the starting index of each substring of str that matches the character patterns specified by the regular expression.
eLife: Gene specificity landscapes for comparative transcriptomic analysis across tissues, cell types, and species
This important study advances a new computational approach to measure and visualize gene expression specificity across different tissues and cell types. The framework is potentially helpful for ...
Gene specificity landscapes for comparative transcriptomic analysis across tissues, cell types, and species