Conversion to double from struct is not possible.

{
x=0:0.01:2*pi;
y=sin(x);
figure;
plot(x,y,'r');
xlim([0 2*pi]);
ax=gca;
set(ax,'xtick',[0 pi 2*pi],'xticklabel',{'0','1','2'});
set(ax,'ytick',-1:.5:1);
}

it says error using 'set', wondering what's the mistake

[Cedric]

What happens if you evaluate

 >> clear all

and then copy-paste exactly this code in the command window? If it works you may have shadowed something earlier; if it doesn't work, which version of MATLAB are you using?

Answer 1

[Image Analyst]

I don't think you can enclose a block of 8 lines in braces like you did. With them in there I get a different error message than you did. If I take them out, I get no error message at all.

Also, you can use xticks() and yticks() and xticklabels() and yticklabels() instead of set() if you have R2016b version of MATLAB or later.

[Cedric]

I apologize ImageAnalyst, I edited out the {} because I thought that the OP had used them for formatting code in the forum. I will put them back so people understand.

Answer 2

[Yandong Ji]

Thanka, my MATLAB is 2015b. I found it can only read ax.XTick or set(ax,'XTick',[0 pi 2*pi]) instead of ax.xtick, just the problem of caps.

Answer 3

[Yandong Ji]

you are both right. Some hours ago I met all the problems you mentioned. Besides, just now I used xtick and it showed 'No public property xtick exists for class matlab.graphics.axis.Axes.'.

Answer 4

[Massimo Lucia]

Can you please help me with this error message?

Conversion to double from struct is not possible.

Error in STABLE (line 79)
    qs(i,:) = qSol;

Find attached the STABLE.m

[Image Analyst]

Start a new question with this. In the meantime, put this on it's own line just before that line 79 and see what fields get listed in the command window:

qSol   % Don't use a semicolon!

[Massimo Lucia]

https://it.mathworks.com/matlabcentral/answers/523191-conversion-to-double-from-struct-is-not-possible