How do I create a BSFC contour map?

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Jack
Jack 2015-3-30
编辑： Udaya kumar Manogarane 2018-5-14
Hi,
I've managed to create a 3D plot using BSFC, speed and BMEP data:
figure
plot3(speed,BMEP,BSFC)
tri = delaunay(speed,BMEP);
h = trisurf(tri,speed,BMEP,BSFC);
shading interp
colorbar
I would however like to create a simple 2D contour map using the same data and have been unsuccessful. Can any one help?
The data used is:
speed = [1200 2400 2400 2400 3000 1800 1800];
BMEP = [1.70 1.30 2.55 4.22 4.99 4.25 1.71];
BSFC=[ 0.2927 0.3278 0.2530 0.2056 0.1834 0.2171 0.3224]
Any help would be appreciated.
  2 个评论
John D'Errico
John D'Errico 2015-3-30
Please do not do this. it makes this question useless for anyone to learn from.
Rena Berman
Rena Berman 2017-1-12
(Answers Dev) Restored question.

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Chad Greene
Chad Greene 2015-3-30
How's this? It uses John D'Errico's gridfit function.
% Input data:
speed = [1200 2400 2400 2400 3000 1800 1800];
BMEP = [1.70 1.30 2.55 4.22 4.99 4.25 1.71];
BSFC=[ 0.2927 0.3278 0.2530 0.2056 0.1834 0.2171 0.3224];
% Create gridded data:
speedgrid = linspace(min(speed),max(speed),50);
BMEPgrid = linspace(min(BMEP),max(BMEP),50);
BSFCgrid = gridfit(speed,BMEP,BSFC,speedgrid,BMEPgrid);
% Plot:
contour(speedgrid,BMEPgrid,BSFCgrid)
hold on
plot(speed,BMEP,'r*','markersize',12)
legend('contours','data points')
  3 个评论
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Chad Greene
Chad Greene 2017-10-27
You must download gridfit from the File Exchange site.
Udaya kumar Manogarane
Udaya kumar Manogarane 2018-5-14
编辑：Udaya kumar Manogarane 2018-5-14
I have the same doubt. I have my Rpm, Torque(Nm),BSFC(g/kwh). I used the gridfit code as well, which you attached in the above commment.But at the end, i am not getting my BSFC curve. I have attached my BSFC map. I dont know, why it look like worse or not similar like a normal BSFC map. Can anyone give me a solution for this.Thanks in advance

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