Hello,

I have a huge sparse matrix (1.5e6 x 1.5e6) of both symbolic or non-symbolic form. When I export matrix using ExportMatrix command, it is not writing the matrix in order of rows and columns. To further explain the problem,

Let A be that huge sparse matrix. I am using

ExportMatrix("matrix.mtx",A,format=MatrixMarket) We expect the output to be, 1 1 0.1 1 10 0.65 . . . But it is writing the output as 100 1 0.25 100 25 0.65 Hence it is not writing in order. What is the way we can force it to write in order? I do understand using for loop will consume more time.

ExportMatrix("matrix.mtx",A,format=MatrixMarket)

We expect the output to be,

1 1 0.1

1 10 0.65

.

But it is writing the output as

100 1 0.25

100 25 0.65

Hence it is not writing in order. What is the way we can force it to write in order? I do understand using for loop will consume more time.

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Hi

Is there a way of importing data in NetCDF format into Maple 15? This format is very widely used in atmospheric sciences as a data standard for experimental data such as satellite-derived data.

Thanks

I am working on a project where Maple's output is fed to another software which requires all it's input in specific format. So, I want to print this expression,say

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y=2*x+0.2, So now I have to change

+2. to 2.0 or 2 (if it's starting of the equation)

-2. to -2.0

.2 to 0.2

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diff(x(t),t)=y(t) & diff(y(t),t)=x(t)^2

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Hello every one,

I am using similarity transformation to transform a PDE into an ODE.

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pdetoodest.mw

hello,

after defining N_1 N_2 and N_3 with long numbers, and defining M by N_1*N_2*N_3 i tried to step backwards.

By entering something like: M/N_1 (what is exactly like N_2*N_3) it does not show me full numbers, but instead 1/something*M.

After refreshing M and afterwards refreshing M/N_1 it totally worked out and showed me the product of N_2*N_3

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when i copy my results in excell or notepad, they are in the following format

Dear All,

Further to my previous question on this forum "How to write data from a matrix while choosing the format?", I would like to update it by adding a complex number. What is the easiest way to deal with that?

Here is the file (that does not compile): writedataMatrix.mw

> driver := proc () local A, B, x, f, g, i, j, format, fd:A := Matrix(3, 3):f := 1-2*I:g := evalf(sin((1/5)*Pi)):

I would like to know the easiest way to write data, that are stored in a matrix after a computation, to a file with a specific format. To be more precise, I wish to have the possibility to change the format for a given column.

Here is a trial (output is wrote to the terminal for simplification) based on some examples I found, but without success.

WritedataMatrix.mw

Hi all!

Please I'm having difficulties in specifying a repeat count for my format descriptor in Maple. For example,If I want to repeat the format descriptor "%-+8.4f" ten times, is it compulsary that I write it explicitly as shown below?

fprintf(file, "\n%-+8.4f%-+8.4f%-+8.4f%-+8.4f%-+8.4f%-+8.4f%-+8.4f%-+8.4f%-+8.4f%-+8.4f",e[5],mp[5],zp[5],mt[5],zt[5],roc[5],ac[5],pnloc[5],fs[5],qcode[5]):

I know in Fortran, a descriptor such as "10F8.4" is possible....

every time I enter / or ^, maple automatically changed the text I entered into fraction or power, and I am having hard time enter equations normally like the way I do in graphic calculator or matlab. I am forced to type all my equations on a text pad and then copy over.is there a way to stop maple from auto formatting my input text? I am more of a matlab guy and I really need to use symbolics and integration abilities right now, but this version of maple is making...

I would like to see the contents of a .m file into a human readable form. How do I do that?

From http://www.maplesoft.com/view.aspx?SF=87640/0 \ Simple_Harmonic_Moti.mwsIn several attempts I have downloaded the maple worksheet Simple_Harmonic_Moti.mws.When I try to open I get the following message:

link imagen

How to proceed to execute the worksheet?

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