setting y axis to specific values

UPDATE FROM MY QUESTION BELOW: I should have done a bit of research before posting. Don't know why i didn't assume matlab would have an automatic way to link axes. I have used the linkaxes function to link the left and right axes together and it worked. However, i still would like to apply the (-50,50) as my standard y min and y max. So for example i have the billateral muscles that are linked and have y min and ymax values as (-20,20).

I have a tiled plot and the two plots in question are tiles 1 and 2 with corresponding ax1 and ax2 variables:

% Tile 1

ax1=nexttile

p1=plot(ChannelTitle,LUTbandpass);

xlim([xlim1 xlim2])

% Tile 2

ax2=nexttile

p2=plot(ChannelTitle,RUTbandpass);

xlim([xlim1 xlim2])

linkaxes([ax1 ax2],'y')

The column vectors LUTbandpass and RUTbandpass are what i want to find the max and min of and figure out if either is below the +/- 50 and if so, want to set the y axis to (-50,50)

Hope that makes sense.

Thank you

END EDIT

Hi,

I am curious if my below code can be made more efficent/streamlined. I have two EMG plots from a muscle, one from the right side and one from the left. I want my code to look at the y max and min of both plots and determine which is higher and then set that scale for both plots.

I currently have this for the y max and y min determination:

%ymax

if max(left)<50 && max(right)<50

ymax=50

elseif max(right)>max(left)

ymax=max(right)+.15*(max(right))

else

ymax=max(left)+.15*(max(left))

end

%ymin

if min(left)>-50 && min(right)>-50

ymin=-50

elseif min(right)<min(left)

ymin=min(right)+.15*(min(right))

else

ymin=min(left)+.15*(min(left))

end

I have a set of 8 billateral muscles and don't want to repeat this code over and over.

Once i have the ymax and ymin values i will use them in my overall plot with code:

ylim([ymin ymax])

Any help would be apprecated!

Thank you in advance

[Ines Shekhovtsov]

An update, i should have done a bit of research before posting. Don't know why i didn't assume matlab would have an automatic way to link axes. I have used the linkaxes function to link the left and right axes together and it worked. However, i still would like to apply the (-50,50) as my standard y min and y max. So for example i have the billateral muscles that are linked and have y min and ymax values as (-20,20).

I have a tiled plot and the two plots in question are tiles 1 and 2 with corresponding ax1 and ax2 variables:

% Tile 1

ax1=nexttile

p1=plot(ChannelTitle,LUTbandpass);

xlim([xlim1 xlim2])

% Tile 2

ax2=nexttile

p2=plot(ChannelTitle,RUTbandpass);

xlim([xlim1 xlim2])

linkaxes([ax1 ax2],'y')

The column vectors LUTbandpass and RUTbandpass are what i want to find the max and min of and figure out if either is below the +/- 50 and if so, want to set the y axis to (-50,50)

Hope that makes sense.

Thank you

[Voss]

@Ines Shekhovtsov: Have you seen my answer? Do you think it will work for you? Is there anything that doesn't make sense about it?

Answer 1

[Voss]

This is streamlined somewhat:

%ymax 
max_left = max(left);
max_right = max(right);
if max_left < 50 && max_right < 50
    ymax = 50;
else
    ymax = 1.15*max(max_right,max_left);
end

%ymin
min_left = min(left);
min_right = min(right);
if min_left > -50 && min_right > -50
    ymin = -50;
else
    ymin = 1.15*min(min_right,min_left);
end

If you don't want to have these several lines of code repeated several times in your code, you can make it into a function ...

function out = get_ylim_from_data(left,right)

%ymax 
max_left = max(left);
max_right = max(right);
if max_left < 50 && max_right < 50
    ymax = 50;
else
    ymax = 1.15*max(max_right,max_left);
end

%ymin
min_left = min(left);
min_right = min(right);
if min_left > -50 && min_right > -50
    ymin = -50;
else
    ymin = 1.15*min(min_right,min_left);
end

out = [ymin ymax];

end

... and call it when you need it:

ylim(get_ylim_from_data(left,right))

[Ines Shekhovtsov]

Thank you for the answer, it makes sense but im just not as familiar with using functions in matlab. I will take a look at this and try it out!

[Voss]

You're welcome!

Try it out, and let me know if you have any questions or problems.