MATLAB: Plotting a 2D Heat map for a square

2d platecolour mapdistributionheat mappredictingsurface plottemperaturethermal

Hi,

I have 9 Data points corresponding to temperatures within a 2d square, distributed as a 3 x 3 grid. I would like to create a colour plot whereby I have blue (cold) and red (hot) regions respectively. But I would like to have it blended such that intermediate temperatures are orange and slowly transition to red or blue. Basically if predicting the temperature at all locations. Treat the square as a 5 x 5 where the 3 x 3 inner points are known and the temperature along the boundaries are constant and known.

Please let me know if this makes sense.

Best Answer

Read about pcolor and colormap

N = 5 ;
x = linspace(0,1,N) ;
y = linspace(0,1,N) ;
T = rand(N) ;
pcolor(x,y,T) ;
colorbar
% colormap(jet)

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MATLAB: Associate colormap to temperature of plot x,y data

HI,

this was my final solution.

colormap = jet; % or type out values of jet into colormap
x = 1:0.1:20; % dummy dataset
y = sin(x);
newrange = [1:64/100:64]'; % temperature range of -25degC to +75degC = 100 points
oldrange = [1:1:64]';
colormapinterp = interp1(oldrange,colormap,newrange); %Vq = interp1(X,V,Xq);
temprange = [-25:1:75];
temp1 = -15;
temp2 = 25;
temp3 = 65;
k1 = find(temprange==temp1); % find index of each temperature
k2 = find(temprange==temp2);
k3 = find(temprange==temp3);
color1 = colormapinterp(k1,:,:); % find color based on index value
color2 = colormapinterp(k2,:,:);
color3= colormapinterp(k3,:,:);
figure
plot(x,y,'Color',color1)
hold on
plot(x,10*y,'Color',color2)
hold on
plot(x,5*y,'Color',color3)

MATLAB: How to Approximate Chi Square

Hi, I eventually found what i needed.

its

chi2inv

function,

thanks

Best Answer

Related Solutions

MATLAB: Associate colormap to temperature of plot x,y data

MATLAB: How to Approximate Chi Square

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