2D plot by including third parameter as colorbar

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Anju K Joshi 2020-3-10

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https://ww2.mathworks.cn/matlabcentral/answers/510127-2d-plot-by-including-third-parameter-as-colorbar

评论： Anju K Joshi 2020-3-23

I have 3 matrices (X Y and Z). Among these X and Z are of same size, that means same number of rows and columns. the second one Y is a column vector with same number of rows of X and Z. I need to create a plot between these three.The x axis will be matrix X and y axis will be vector Y. The values in Z matrix corresponding to X and Y matrix is represented in the plot and the values should show as colorbar.

Can anyone help please? I will be so grateful.

[SL: the text was formatted as code. Formatted it as text instead.]

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Hank 2020-3-10

see this thread: https://www.mathworks.com/matlabcentral/answers/5042-how-do-i-vary-color-along-a-2d-line

Anju K Joshi 2020-3-12

I got the figure like this.. the problem is that the left and right portion should be blue and middle portion should be red according to the value..but the left side is only blue and middle and right side is blue...according to colourbar and the value in Z axis is near to blue in colorbar

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Answer 1

Piyush Lakhani 2020-3-12

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https://ww2.mathworks.cn/matlabcentral/answers/510127-2d-plot-by-including-third-parameter-as-colorbar#answer_419796

在 MATLAB Online 中打开

The simplest way to doing this is by using the 'surf' or 'contourf' functions.

But, for that you need to create m x n matrix for all three variables. First convert Y from column to Row and then use 'meshgrid' comand to create Y as same size as X.

Y=Y';
Y=meshgrid(Y);
Y=Y(length(X),:);

Then use countourf

contourf(X,Y,Z)

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Anju K Joshi 2020-3-17

but using this code, both X and Z is getting plotted in the figure as line and shade respectively. I need to display only Z matrix as line and I need shade in between all lines.

Anju K Joshi 2020-3-23