# How to have a common colorbar for all tiledlayout plots?

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Abhishek Chakraborty on 17 Jun 2022
Commented: Voss on 21 Nov 2022
I want to plot two arrays A and B (both having 4 rows and 8 columns) using the tiledlayout format so that both of them have a common colorbar. I tried the following code:
A=[14,8,3,5,6,5,3,3;16,2,7,-7,3,1,1,4;3,1,1,1,1,0,0,0;3,1,2,1,1,0,0,0];
B=[5,4,3,3,1,0,0,0;33,0,5,8,5,4,3,5;0,0,0,1,0,0,0,0;2,0,1,2,0,0,0,0];
figure;
nexttile;
imagesc(A);
title('A','FontWeight','bold','FontSize',12,'FontName','Helvetica');
nexttile;
imagesc(B);
title('B','FontWeight','bold','FontSize',12,'FontName','Helvetica');
cb = colorbar;cb.Layout.Tile = 'east';
Notice that the element at row=2 and column=4 of array 'A' is a negative number (-7). However, the common colorbar made by the code given above is only showing positive values as shown in the screenshot given below:
How to solve this issue so that the common colorbar shows all the range of values in both the tiles?

Voss on 17 Jun 2022
You can calculate the min and max value of A and B together and set the CLim of both axes to those values using the clim (formerly known as caxis) function.
A=[14,8,3,5,6,5,3,3;16,2,7,-7,3,1,1,4;3,1,1,1,1,0,0,0;3,1,2,1,1,0,0,0];
B=[5,4,3,3,1,0,0,0;33,0,5,8,5,4,3,5;0,0,0,1,0,0,0,0;2,0,1,2,0,0,0,0];
c_min = min([A(:); B(:)]);
c_max = max([A(:); B(:)]);
figure;
nexttile;
imagesc(A);
clim([c_min c_max]);
title('A','FontWeight','bold','FontSize',12,'FontName','Helvetica');
nexttile;
imagesc(B);
clim([c_min c_max]);
title('B','FontWeight','bold','FontSize',12,'FontName','Helvetica');
cb = colorbar;
cb.Layout.Tile = 'east';
Voss on 21 Nov 2022
Depending on what you want, you might try playing with the colorbar's Position or the axes' CLim.

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