plotting a function

[mark_neil2]

Hi,

I have a question regarding usage of MC11. Please see the attached file. I have 2x2 matrix which contains functions of time t. I want to plot the functions of the matrix a. I tried it on the element (0,0). If I put the fucntion in on the plot as a00, then it doesn't plot it. If I assign it to a function b(t), it still doesn't plot it. I have copy the function and assign it c(t) for it to plot it. I don't want to manually copy and paste the function to get it plotted. Is there a way to plot a function in matrix a directly on a graph without copying the function and assigning it to another function? Thanks.

Mark.

[f.kohlhepp]

Your syntax is a bit off. When you define a function, most of the time you need the argument as well. "a(t)" not just"a".

[mark_neil2]

Thanks.

I didn't show where function matrix a comes form. It is solution of an inverse laplace transform. I have included that section in the attached file. The difficulty is I cannot assign the result of inverse laplace to a function as a(t), but only as "a"...

Mark.

[RichardJ]

Add one more step

[mark_neil2]

Richard,

Thanks for your reply. But it doesn't work in MC11. I have attached the output of MC11 version here. Does your suggestion work on some other version of Mathcad?

Mark.

[RichardJ]

For me it works in both 11 and 13 (but not 15). If you click on tjhe graph, what's the error message?

Also, which version of 11 are you running?

[mark_neil2]

I use version 11.0a. The error message on the graph that plots "a(t)00" is "This is not a scalar. Press F1 for help.".

Mark.

[RichardJ]

Download the service release for 11.2a and install it. It is a significant improvement over 11.1, let alone 11.0.

[mark_neil2]

Do you have the link for it?

Mark.

[RichardJ]

Try this:

http://www.ptc.com/support/mathcad_downloads.htm

Make sure you download the correct one (either Enterprise or Single User). Also note that there are separate downloads for the program and the documentation.