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#include "mplot.h"
void range(double x0, double y0, double x1, double y1){
e1->xmin = x0;
e1->ymin = y0;
e1->scalex = e1->sidex / (x1 - x0 );
e1->scaley = e1->sidey / (y1 - y0 );
e1->quantum=e0->quantum/sqrt(e1->scalex*e1->scalex +
e1->scaley*e1->scaley);
if(e1->quantum < .01)
e1->quantum = .01;
}
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