Scilab 5.3.0
- Manuel Scilab
- API call_scilab
- Boolean management
- Complex management
- DisableInteractiveMode
- Double management
- GetLastJob
- ScilabHaveAGraph
- SendScilabJob
- SendScilabJobs
- StartScilab
- String management
- TerminateScilab
- call_scilab
- Compile and run with Call Scilab
- creadbmat (obsolete)
- creadchain (obsolete)
- creadcmat (obsolete)
- creadmat (obsolete)
- cwritebmat (obsolete)
- cwritechain (obsolete)
- cwritecmat (obsolete)
- cwritemat (obsolete)
- fromc
- fromjava
Please note that the recommended version of Scilab is 2024.1.0. This page might be outdated.
However, this page did not exist in the previous stable version.
Double management
How to manage Scilab's variable read and write process using call_scilab and api_scilab
Description
This help describes how doubles and matrix of doubles can be handle through the Call Scilab API and api Scilab.
There are several functions which can be used to read / write from the memory of Scilab. These functions are described in dedicated pages.
Note that the default type of a numeric value in Scilab is double. For example, in a=1 or a=[1,2], a will be consider as a double.
Note: Access to variables is done through api Scilab (named variable).
Examples
/* * Write a matrix into Scilab * B=[1 4 2 3; * 3 9 8 2 ] * Note that it is done column by column */ double B[] = {1,3,4,9,2,8,3,2}; /* Declare the matrix */ int rowB = 2, colB = 4; /* Size of the matrix */ char variableNameB[] = "B"; SciErr sciErr; /* * Write it into Scilab's memory */ sciErr = createNamedMatrixOfDouble(pvApiCtx,variableNameB,rowB,colB, B); /* pvApiCtx is a global variable */ if(sciErr.iErr) { printError(&sciErr, 0); } /* * Prior to Scilab 5.2: * C2F(cwritemat)(variableNameB, &rowB, &colB, B, strlen(variableNameB)); */ printf("\n"); printf("Display from Scilab of B:\n"); SendScilabJob("disp(B);"); /* Display B */
/* Read the previously declared matrix of double B */ int rowB_ = 0, colB_ = 0, lp_ = 0; double *matrixOfDoubleB = NULL; int i = 0, j = 0; char variableToBeRetrievedB[] = "B"; SciErr sciErr; /* First, retrieve the size of the matrix */ sciErr = readNamedMatrixOfDouble(pvApiCtx, variableToBeRetrievedB, &rowB_, &colB_, NULL); if(sciErr.iErr) { printError(&sciErr, 0); } /* * Prior to Scilab 5.2: * C2F(cmatptr)(variableToBeRetrievedB, &rowB_, &colB_, &lp_, strlen(variableToBeRetrievedB)); */ /* Alloc the memory */ matrixOfDoubleB = (double*)malloc((rowB_*colB_)*sizeof(double)); /* Load the matrix */ sciErr = readNamedMatrixOfDouble(pvApiCtx, variableToBeRetrievedB, &rowB_, &colB_, matrixOfDoubleB); if(sciErr.iErr) { printError(&sciErr, 0); } /* * Prior to Scilab 5.2: * C2F(creadmat)(variableToBeRetrievedB,&rowB_,&colB_,matrixOfDoubleB,strlen(variableToBeRetrievedB) ); */ printf("\n"); printf("Display from B formated (size: %d, %d):\n",rowB_, colB_); for(j = 0 ; j < rowB_ ; j++) { for(i = 0 ; i < colB_ ; i++) { /* Display the formated matrix ... the way the user * expect */ printf("%5.2f ",matrixOfDoubleB[i * rowB_ + j]); } printf("\n"); /* New row of the matrix */ }
See Also
- Call_Scilab
- api Scilab
- API_Scilab: Double reading
- API_Scilab: Double writing
- SendScilabJob
- StartScilab
- Call_Scilab: BooleanManagement
- Call_Scilab: ComplexManagement
- Call_Scilab: StringManagement
- API_Scilab: Boolean Reading
- API_Scilab: Boolean Writing
- API_Scilab: String Reading
- API_Scilab: String Writing
Authors
Sylvestre Ledru
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