.\" Copyright (c) 2015-2024, The matio contributors .\" Copyright (c) 2011-2014, Christopher C. Hulbert .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions are met: .\" .\" 1. Redistributions of source code must retain the above copyright notice, this .\" list of conditions and the following disclaimer. .\" .\" 2. Redistributions in binary form must reproduce the above copyright notice, .\" this list of conditions and the following disclaimer in the documentation .\" and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" .\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE .\" DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR .\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER .\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, .\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE .\" OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. .\" .Dd September 12, 2019 .Dt MAT_VARREADINFO 3 .Os .Sh NAME .Nm Mat_VarReadInfo .Nd Reads the information for a specific variable in a MATLAB MAT file. .Sh SYNOPSIS .Fd #include .Ft matvar_t * .Fo Mat_VarReadInfo .Fa "mat_t *matfp" .Fa "const char *name" .Fc .Sh DESCRIPTION The .Fn Mat_VarReadInfo function reads the information for the variable .Fa name in the open MAT file. .Sh RETURN VALUES If the variable was found in the MAT file and the information about the variable successfully read, a pointer to the MATLAB variable structure is returned. If the variable was not found, or there was an error reading the variable information, NULL is returned. .Sh EXAMPLES .Bd -literal #include "matio.h" int main(int argc, char **argv) { mat_t *matfp; matvar_t *matvar; matfp = Mat_Open(argv[1], MAT_ACC_RDONLY); if ( NULL == matfp ) { fprintf(stderr, "Error opening MAT file %s\n", argv[1]); return EXIT_FAILURE; } matvar = Mat_VarReadInfo(matfp, "x"); if ( NULL != matvar ) { Mat_VarPrint(matvar); Mat_VarFree(matvar); } Mat_Close(matfp); return EXIT_SUCCESS; } .Ed .Sh SEE ALSO .Xr Mat_VarRead 3 , .Xr Mat_VarReadNextInfo 3 , .Xr Mat_VarPrint 3