Hi,

I am not quite sure what you want to achieve, but the thing is that your "function" Modulus does not seem to be a function on y anymore. That is because you have the line:

y = Range[0, 0.25, 0.01] 

Without it, you get a plot:

The notebook is attached.

Cheers,

Marco

Attachments:

Yes! Exactly this! I could recognize this command in the Help and then I took it. Matlab I left behind because it could not solve some tricking Laplace transforms that Wolfram did at once. In fact, I started with Fortran in the late of the 80´s...Pascal, Basic, C and then I moved to Excel for a long time. But it became unsatisfactory for deeper investigations and then here I am...

Marco ! Please, how do I export data of this graphic to a .txt or .xls file ? I want to compare results from Wolfram and excel. The nb. file is attached and the command export does notwork. Would you, please? Thank you ?

Attachments:

No problem. ClearAll clears all symbols in a given context; see here under Generalisations and Extensions. It's quite a useful command.

With the Range command you defined y to be a list of numbers. When you then used y in the function it did not use that as an independent variable anymore.

Cheers,

Marco