@Preben Alsholm That works!

@bastorer

Array2:= Copy(Array1);

is not valid syntax for ArrayTools:-Copy. You must have another package loaded that has a Copy command.

@henrylyl The file link works now.

@Preben Alsholm It doesn't work recursively. Example:

restart:
Array1:= Array([Array([1, 2]), Array([3, 4])]):
Array2:= copy(Array1):
Array1[1][1]:= 11:
Array1;
Array2;
              

That was asked and answered 10 days ago, probably by a classmate of yours. See here.

@Markiyan Hirnyk 

I see your point. I wonder why the presence of r with no assumptions makes Maple think that it knows the integral.

@henrylyl File didn't attach. Try uploading again please.

@Markiyan Hirnyk Just plain integrate it:

int(BesselJ(2, r*k)*BesselJ(1, 1500*k), k= 0..infinity);

                                                0

@Markiyan Hirnyk Thanks. I got all files from Christopher's attached zip file.

Please supply (as an attached worksheet) the complete code that you used to read in the data. And please also attach the data files.

The worksheet that you display in your Question is not exactly the same as the one attached to the Question. For example, the displayed one defines a function TS1, but in the attached it is TS[1]. Please attach the most recent copy of the worksheet.

@Thomas Richard 

There are two problems with using interface(displayprecision), one big and one small. The small problem is that every float is shown to that number of decimal places even if that means adding extra zeros. That's just ugly. Example:

A:= < < .1, .2 > | <.3 , .4> >;

The big problem is that it actually changes the number of decimal places to which a result is shown, not its precision. Example:

A^18;

So there is really only one digit of precision in second column, and zero digits of precision in the first column.

@Markiyan Hirnyk I said that some OTHER operations (not Matrix operations) were done so that the final result is accurate to Digits precision. This is standard English usage of the word "other".

@Markiyan Hirnyk 

Yes, the roundoff error is greater. By setting UseHardwareFloats:= false, the computations are done internally at 5 digits precision also. This is different from a lot of other floating point operations where the number of digits is increased internally so that the final result is accurate to Digits precision.

I deleted your copy of this question from yesterday. Please edit a question instead of making a new copy. Editing a Question will place it back at the top of the Active Conversation lists, so there's no benefit to making a new copy; you'll only annoy people by doing it.

I am sorry that there's not many people on this forum who know MapleSim, including me.