How to use regexp to filter the following file names?

Hello, lets assume that I have the following file format for my files,

fig_figure_mat2007_03_04_yield_2007_03_05

fig_figure_mat2008_03_07_yield_2008_03_08

fig_figure_mat2007_03_05_yield_2007_03_06

fig_figure_mat2008_04_05_yield_2008_04_06

How can I use regexp in this to sort the files out just by using the first bit of the date such as files are sorted in following order:

2007_03_04

2007_03_05

2008_03_07

2008_04_05

Answer 1

[convert_to_metric]

Hi Devarshi,

Since your filenames have a predictable structure of consistent length, you could use hard coded indexing to extract that date and avoid regexp altogether. If filename is a character array containing fig_figure_mat2007_03_04_yield_2007_03_05, filename(15:24) should return the section you're looking for.

[Devarshi Patel]

Thank you! It really helped.