'subsindex' error when setting figure position. What is going on?

I am trying to resize a figure as shown

H = figure;
set(H,'Position',[200 200 800 200])

I get the error

Function 'subsindex' is not defined for values of class 'matlab.ui.Figure'.

What is going on and how can I fix this?

Answer 1

[Walter Roberson]

You accidentally created a variable named set so MATLAB thinks that set() expression is an attempt to index the variable.

[Udit Gupta]

Thanks! Let's not call it an accident and call it as it is - a stupid decision.

[Ragnar Eðvaldsson]

Thanks so much Walter. This saved the day!

[William Chamberlain]

Worked for me: I had managed to create a variable named 'axes' which was giving me problems with

sub_axis_h(3) = subplot(2,2,3);     
axes(sub_axis_h(1));   hold on; grid on; xlabel('x'); ylabel('y');