MATLAB Answers

How to change contour level in different range?

189 views (last 30 days)
Kim Je Young
Kim Je Young on 15 Jul 2019
Commented: Kim Je Young on 16 Jul 2019
Hello, I am new to Matlab.
Currently, I am plotting BSFC map using contour function.
I wanna set different levelstep instead of fixed value.
Due to fixed LevelStep, the below graph looks so ugly.
For levelList<300, I would like to set levelStep=50, and for LevelList>300, I would like to set LevelStep as 5.
Is there any way to control Level Step (Isoline) in different LevelList?
FYI, here is my code.
Thank you for your help in advance.
rawdata=xlsread('BSFC_NA2.xlsx','Sheet1','A1:I88');
RPM =rawdata(:,1);
Torque = rawdata(:,2);
bsfc = rawdata(:,3);
R100 = rawdata(:,4);
T100 = rawdata(:,5);
RPM1 =rawdata(:,6);
Torque1 = rawdata(:,7);
bsfc1 = rawdata(:,8);
% Create gridded data:
Rpmgrid = linspace(1000,max(RPM),10);
Torquegrid = linspace(0,90,10);
BSFCgrid = gridfit(RPM,Torque,bsfc,Rpmgrid,Torquegrid);
[c1,h1]=contour(Rpmgrid,Torquegrid,BSFCgrid,'LevelStep',5,'ShowText','on'); drawnow
set(h1.EdgePrims(h1.LevelList>0 ), 'LineStyle', 'dotted');
hold on
k5=plot(R100,T100,'r','LineWidth',3)
hold on
untitled.jpg

  0 Comments

Sign in to comment.

Accepted Answer

KSSV
KSSV on 15 Jul 2019
[X,Y,Z] = peaks(100) ;
figure
hold on
contour(X,Y,Z,'LevelList',-6:0.2:4) % levels with difference 0.2 for till 4
contour(X,Y,Z,'LevelList',4:0.5:8) % levels with difference 0.5 from 4 to 8

  1 Comment

Kim Je Young
Kim Je Young on 16 Jul 2019
Thanks alot! It works perfetcly as I wish!

Sign in to comment.

More Answers (0)

Sign in to answer this question.