HOW TO APPEND THE MAT files in ASCII

i have to add the variable row vize so that second variable at the end of first data save(filename,'variable name','-append') is not wrking. it replaces the contents of the variable only

I am confused by your title. In it you say "in ASCII", but in your save() command you do not show the -ascii flag ?

i can't understand that is there any code for doing that

Please post a short example by editing the question. Currently I do not understand what you want to achieve. In addition it would be nice to answer Walter's question.

save(filename,'variable name','-append', '-ascii')

I'm not sure if that is what you mean?