how to change a line in text file?

Hi i have the following text file:

1. *
2. * STEP: Step-1
3. *
4. * *Step, name=Step-1
5. * *Static
6. * 1., 1., 1e-05, 1.
7. *
8. * BOUNDARY CONDITIONS
9. *
10. * Name: BC-1 Type: Symmetry/Antisymmetry/Encastre
11. * *Boundary
12. * Set-1, ENCASTRE
13. *
14. * LOADS
15. *
16. * Name: Load-1 Type: Pressure
17. * *Dsload
18. * Surf-1, P, 20

i would like to change no (20) on last line with matlab. how i can do that

[Cedric]

Is it always the last line? Is the text before this 20 always 'Surf-1, P,'?

Answer 1

[dpb]

http://www.mathworks.com/matlabcentral/answers/132079-replacing-a-string-with-another-string-in-a-text-file