How to import .csv file data into gsl_vectors? C++

Question

I have a .csv file that looks like:
X,Y,Z
-0.00624347,-0.0182673,1.00063
-0.00845628,-0.0374925,1.00058
-0.00494793,-0.0295639,0.927447

And I want to put it into three gsl_vectors (from GSL:https://www.gnu.org/software/gsl/doc/html/vectors.html) corresponding to the column X, column Y and column Z .I later want to use the functions that are implemented in the GSL on this data. I want to emphasize that these functions can only work on gsl_vectors and not on std:vectors.
My approaches:
1. Put the data from the .csv into std:vectors, then transform those vectors into gsl_vectors. That did not work.
2. Put the data from the .csv file into gsl_vectors directly: https://code.sololearn.com/cA2a5A24a104
This gives no output on the Console and if I debug it, the function gsl_vector_set throws an exception: Exception thrown at 0x7A5EED1A (gsld.dll) in progr.exe: 0xC0000005: Access violation writing location 0x3333332, at gsl_set_vector's line: v->data[i * v->stride] = x;
3. Put the .csv data into a gsl_block and then slice it into gsl_vectors: https://code.sololearn.com/ca6a21A24A20
If I run this I get:
Debug Error! abort() has been called
And on the Console it is shown:
gsl: C:\DEV\vcpkg\buildtrees\gsl\src\gsl-2-fb511965d5.clean\block\fprintf_source.c:90: ERROR: fscanf failed Default GSL error handler invoked.
If I debug this, the gsl_error function throws an exception:
progr.exe has triggered a breakpoint, at abort ();

Answer 1

Thank you for the advice! I've shared the links now.

Answer 2

it seems there isn't much cpp experts in sololearn it has been hours this question is here :)
I am not an expert but according to documentation link you have provided i come up with something like this. there is probability that it can help. if you have found solution please share it here. this gsl seems to be useful in future for me

//Read csv into matrix
gsl_matrix * data = gsl_matrix_alloc (3, 3); //specify input data dimensions

FILE * f = fopen ("data.csv", "rb");
gsl_matrix_fread (f, data );
fclose (f);

gsl_vector_view Xv = gsl_matrix_column (data, 0);
gsl_vector_view Yv = gsl_matrix_column (data, 1);
gsl_vector_view Zv = gsl_matrix_column (data, 2);

//Then convert to gsl_vector
gsl_vector X = Xv.vector;
gsl_vector Y = Yv.vector;
gsl_vector Z = Zv.vector;

Answer 3

Thank you for your help! I haven't thought of this idea before and it might work! I'm currently debugging since it doesn't show me what I want and I hope I will succeed in order to share it here! Thank you very much once again!

Answer 4

lalal In documentation i think there was another method that you can use to access a column by its header name. In sololearn are you able to run code with gsl lib? when i tried it fails to include gsl lib.

Answer 5

I can't run it in sololearn. Instead, I have installed the library on my local machine like this: https://solarianprogrammer.com/2020/01/26/getting-started-gsl-gnu-scientific-library-windows-macos-linux/