How to stretch cos fit

I need stretch cos function to the borders. The question is - how?

Answer 1

[Jaroslav Zadnik]

script:

Answer 2

[Walter Roberson]

axes([0 0.75 0.75 1.03]);   %must do this before plot
h(1) = scatter(xData, yData, 'b+', 'DisplayName', 'data');
hold on
h(2) = plot(fitresult);        %when no arguments are given, plots for current axes limits
hold off

[Jaroslav Zadnik]

Thank you!

The last question - How can I change the markersize ?

EDIT: I enlarget it - h(1) = scatter(xData, yData,200);

but in legend is marker still small

[Walter Roberson]

pointsize = 20;
h(1) = scatter(xData, yData, pointsize, 'b+', 'DisplayName', 'data');

[Jaroslav Zadnik]

error

[Walter Roberson]

pointsize = 60;
h(1) = scatter(xData, yData, pointsize, 'b', '+', 'DisplayName', 'data');

[Jaroslav Zadnik]

When I set pointsize = 60, marker is bigger. But marker in legend is still small

[Walter Roberson]

Because marker sizes can be set point by point for scatter(), it does not seem to reliably set the legend marker size even if the size is the same for all of the entries.

Please see the below for a work-around involving plotting extra hiidden objects:

https://www.mathworks.com/matlabcentral/answers/50250-how-can-i-change-the-marker-size-in-legend#answer_426832