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11.111 Sample ‘scanfile’ ¶

Example of scanfile for reading ’named’ data.

MGL code:

subplot 1 1 0 '<_':title 'Save and scanfile sample'
list a 1 -1 0
save 'This is test: 0 -> ',a(0),' q' 'test.txt' 'w'
save 'This is test: 1 -> ',a(1),' q' 'test.txt'
save 'This is test: 2 -> ',a(2),' q' 'test.txt'

scanfile a 'test.txt' 'This is test: %g -> %g'
ranges a(0) a(1):axis:plot a(0) a(1) 'o'

C++ code:

void smgl_scanfile(mglGraph *gr)
{
	gr->SubPlot(1,1,0,"<_");
	if(big!=3)	gr->Title("Save and scanfile sample");
	FILE *fp=fopen("test.txt","w");
	fprintf(fp,"This is test: 0 -> 1 q\n");
	fprintf(fp,"This is test: 1 -> -1 q\n");
	fprintf(fp,"This is test: 2 -> 0 q\n");
	fclose(fp);

	mglData a;
	a.ScanFile("test.txt","This is test: %g -> %g");
	gr->SetRanges(a.SubData(0), a.SubData(1));
	gr->Axis();	gr->Plot(a.SubData(0),a.SubData(1),"o");
}