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Справка Scilab >> API Scilab > sparse > sparse example

sparse example

Sparse use case.

Description

This example shows how to get a sparse variable and return it to Scilab.

Gateway Source

#include "api_scilab.h"
int sparseExample(char *fname,unsigned long fname_len)
{
	SciErr sciErr;
	int* piAddr = NULL;
	int iType   = 0;
	int iRet    = 0;

    CheckInputArgument(pvApiCtx, 1, 1);
    CheckOutputArgument(pvApiCtx, 0, 1);

	sciErr = getVarAddressFromPosition(pvApiCtx, 1, &piAddr);
	if(sciErr.iErr)
	{
		printError(&sciErr, 0);
		return 0;
	}

	if(isSparseType(pvApiCtx, piAddr))
	{
		int iRows           = 0;
		int iCols           = 0;
		int iNbItem         = 0;
		int* piNbItemRow	= NULL;
		int* piColPos       = NULL;
		double* pdblReal	= NULL;
		double* pdblImg		= NULL;

		if(isVarComplex(pvApiCtx, piAddr))
		{
			iRet = getAllocatedComplexSparseMatrix(pvApiCtx, piAddr, &iRows, &iCols, &iNbItem, &piNbItemRow, &piColPos, &pdblReal, &pdblImg);
			if(iRet)
			{
				freeAllocatedComplexSparseMatrix(piNbItemRow, piColPos, pdblReal, pdblImg);
				return iRet;
			}

			sciErr = createComplexSparseMatrix(pvApiCtx, nbInputArgument(pvApiCtx) + 1, iRows, iCols, iNbItem, piNbItemRow, piColPos, pdblReal, pdblImg);
			if(sciErr.iErr)
			{
				freeAllocatedComplexSparseMatrix(piNbItemRow, piColPos, pdblReal, pdblImg);
				printError(&sciErr, 0);
				return sciErr.iErr;
			}

			freeAllocatedComplexSparseMatrix(piNbItemRow, piColPos, pdblReal, pdblImg);
		}
		else
		{
			iRet = getAllocatedSparseMatrix(pvApiCtx, piAddr, &iRows, &iCols, &iNbItem, &piNbItemRow, &piColPos, &pdblReal);
			if(iRet)
			{
				freeAllocatedSparseMatrix(piNbItemRow, piColPos, pdblReal);
				return iRet;
			}

			sciErr = createSparseMatrix(pvApiCtx, nbInputArgument(pvApiCtx) + 1, iRows, iCols, iNbItem, piNbItemRow, piColPos, pdblReal);
			if(sciErr.iErr)
			{
				freeAllocatedSparseMatrix(piNbItemRow, piColPos, pdblReal);
				printError(&sciErr, 0);
				return sciErr.iErr;
			}

			freeAllocatedSparseMatrix(piNbItemRow, piColPos, pdblReal);
		}
		AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
	}
	else
	{
		AssignOutputVariable(pvApiCtx, 1) = 0;
	}
	return 0;
}

Scilab test script

a = sparse([1,1;2,2;3,3], [1, 2, 3]);
b = sparse([1,1;2,2;3,3], [1 + 2 * %i, 3 , -4 * %i]);
if sparseExample(a) <> a then pause;end
if sparseExample(b) <> b then pause;end
Report an issue
<< freeAllocatedComplexSparseMatrix sparse string >>

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Last updated:
Thu Oct 02 14:01:18 CEST 2014