How Can I Read and Write Matrices in GSL?

[gradnu]

Does anybody know how to read and write matrices in GSL. I am confused by what is given on the website. It says something about binary format which I have no idea about.
Isn't there any other simple way of reading the matrices as we do in 'C'?

 

[clive]

Function: double gsl_matrix_get (const gsl_matrix * m, size_t i, size_t j)
This function returns the (i,j)-th element of a matrix m. If i or j lie outside the allowed range of 0 to n1-1 and 0 to n2-1 then the error handler is invoked and 0 is returned.


Function: void gsl_matrix_set (gsl_matrix * m, size_t i, size_t j, double x)
This function sets the value of the (i,j)-th element of a matrix m to x. If i or j lies outside the allowed range of 0 to n1-1 and 0 to n2-1 then the error handler is invoked.

 

[gradnu]

Thanks Clive

 

[basil-77]

Hello
I have a question GSL about too. Does anybody know how to compute double and multiple integrals? I have not found it in gsl's manual. Thanks.

 

[LudusRex]

Yes, the GNU Scientific Library (GSL) does have functions for reading and writing matrices in a binary format. This format is used because it is more efficient for large matrices and allows for faster processing. However, if you are not familiar with binary format, there are other options for reading and writing matrices in GSL.

One option is to use the gsl_matrix_fscanf() and gsl_matrix_fprintf() functions, which allow you to read and write matrices in a text format similar to what you may be used to in C. These functions also have options for reading and writing in different formats, such as CSV or plain text.

Another option is to use the gsl_matrix_set() and gsl_matrix_get() functions to manually input and retrieve matrix elements. This may be more familiar to you if you are used to working with matrices in C.

Overall, there are multiple ways to read and write matrices in GSL, and it is important to choose the method that works best for your specific needs and level of familiarity with the library. I would recommend exploring the different options and experimenting with them to see which one is most suitable for your purposes.