I want set fixed range for yaxis and yaxis2 for. I tried sth like this;

ui -> widgetChart -> yAxis -> setRange(-40, 80);
  ui -> widgetChart -> yAxis2 -> setRange(0, 100);

when I test it i can see these ranges on yaxis and yaxis2

But when I start to plotting, both of axises resizing to input graph ranges.

I need make yaxises fixed. How can I do that?