How to create a smooth heatmap for 1D ?

I have the temperature values for the variable Y for 8 node points in 1D . Now when I try to plot I get the temperature gradient as individual boxes as shown below. I dont want this. The code for achieving this result is shown below

  
Y =

   1.0e+03 *

    4.1962
    3.5087
    2.8783
    2.3026
    1.7775
    1.2967
    0.8516
    0.4318
    
    figure(1)
     imagesc(Y)
     axis equal
     axis off
     colorbar;

I need to get an smooth image like the one shown in second figure where the transition is smooth between the temperature gradients.

Any help will be appreciated !

[infinity]

Hello,

The problem is that your data is very coarse. You got the temperature only at 8 points. One of the tasks you shoud be done first is to inpterpolate your data to the finer mesh.

When you obtain smoother data, you can plot smoother figure.

Answer 1

[Sai Bhargav Avula]

Hi Sreenivas,

You are trying to generate the heatmap using only 8 points. Try to interpolate the data using the interp1 function.

For our case:

Y = 1000*[4.1962  3.5087 2.8783 2.3026 1.7775 1.2967 0.8516 0.4318]’; 
X = linspace(1,10,100); 
Y = interp1(Y,X); 
imagesc(Y); 
axis equal 
axis off; 
colorbar;  

Here X is an equally spaced array of 100 elements and is the second argument for the interp1 function. The interp1 function considers the Y as a function and queries for the Y values at each value of X. This results in a Y array with 100 elements, which is ufficient to generate a smooth 1D heat map.

[Sreenivas Ramakrishnan]

Very much thanks for the answer......