why can't plot drawn in app designer?

My code in app designer works without any errors, the limits set with the datas but the plot can't be shown. Where's the problem? M_MED values change between 0 to 60, W_Turbine_MED values change between 60000 to 15000 and the M_disalinated_water values change between 0 to 1.7474. I'll be grateful to help me in this case.

axis(app.UIAxes,'tight');
plot(app.UIAxes,M_MED,W_Turbine_MED,'r',LineWidth=2);
yyaxis(app.UIAxes,'right');
hold on;
plot(app.UIAxes,M_MED,M_disalinated_water,'b',LineWidth=2);

Answer 1

[M Afshari]

I found the solution. That was because of one of the functions of my code which the plot must draw from that, determined just 1 value instead of the matrix of values.