@emma hassan You must select float[8](64-bit). Do not use the 32-bit.

Please upload a copy of the text file, after you've editted out the top row and left column, so that I can investigate. You must also edit out any blank lines.

@emma hassan You must select float[8](64-bit). Do not use the 32-bit.

Please upload a copy of the text file, after you've editted out the top row and left column, so that I can investigate. You must also edit out any blank lines.

@emma hassan When it asks you select the format of the file, choose "Delimited". On the next screen, select the default "Tab separated". On the next screen, select "float[8](64-bit)" (regardless of whether your proessor, OS, or Maple version are 64- or 32-bit).

@emma hassan When it asks you select the format of the file, choose "Delimited". On the next screen, select the default "Tab separated". On the next screen, select "float[8](64-bit)" (regardless of whether your proessor, OS, or Maple version are 64- or 32-bit).

I said use ImportData(). Your worksheet attempts to use ImportMatrix.

I said use ImportData(). Your worksheet attempts to use ImportMatrix.

I cut-and-paste your data from your original post into a blank Microsoft Notepad document. Then I editted out the extraneous info, like the top row and the left column. I saved the document, then used Maple's ImportData() command and just followed the interactive directions.

I cut-and-paste your data from your original post into a blank Microsoft Notepad document. Then I editted out the extraneous info, like the top row and the left column. I saved the document, then used Maple's ImportData() command and just followed the interactive directions.

@emma hassan Using the first table from your original post, I made it into a Matrix M as I described; and here is how to plot it:

plots:-surfdata(M, 0.05..0.85, 0.05..0.85, labels= [t,x,U], axes= boxed, title= "Crank-Nicolson");

@emma hassan Using the first table from your original post, I made it into a Matrix M as I described; and here is how to plot it:

plots:-surfdata(M, 0.05..0.85, 0.05..0.85, labels= [t,x,U], axes= boxed, title= "Crank-Nicolson");

@emma hassan Can you make the data into matrices? Or is it already in matrices in your worksheet? I don't need to have it; I just want to know if you have it. I used cut-and-paste from this blog, a bit of editting in Microsoft Notepad, and Maple's ImportData(). Once you have the matrices, I can tell you how to plot them. The matrices should not include the top rows of x-values nor the leftmost columns of t-values. 

@emma hassan Can you make the data into matrices? Or is it already in matrices in your worksheet? I don't need to have it; I just want to know if you have it. I used cut-and-paste from this blog, a bit of editting in Microsoft Notepad, and Maple's ImportData(). Once you have the matrices, I can tell you how to plot them. The matrices should not include the top rows of x-values nor the leftmost columns of t-values. 

@emma hassan In what form do your tables exist in the computer? As matrices, perhaps? Could you upload a worksheet that contains this data?

@emma hassan In what form do your tables exist in the computer? As matrices, perhaps? Could you upload a worksheet that contains this data?

@Markiyan Hirnyk Yes, much of the ListTools package is inefficient. Looking at showstat(ListTools:-Categorize), one can see that the time complexity is at least quadratic in the list length; possibly greater than quadratic because of the building of a sequence by iterative appending in statement 7:

result[j]:= result[j], i;

Since there's no need for us to actually construct the equivalence classes in this case, Statistics:-Tally is a better choice.