在实时图中自动缩放y轴

Question

我正在尝试绘制一个实时图，其中x轴的范围从0到-40，y轴的范围从0到200000000。如何在C中自动缩放该图？

Answer 1

Not sure if I understood your question correctly. If what you are trying to archive is to fit the samples into an area of WxH pixels you can just scale them:

float d = max_y - min_y;
float s = (sample - min_y) / d;
int y = s * height;