3d-plot regarding 2 vectors and a matrix

Hey guys,

i cant seem to figure this one out. So i have a 25 by 25 matrix with Torque values ranging from 0 to about 300 from a data set. Then i have 2 vectors with 25 values regarding a current Iq and a current Id, ranging from 0 to 600. Now i want to plot the current values in the x and y axis and the resulting torque in z. I have tried using the plot3 function but i cant get it going.

Any help would be deeply appreciated

[Jan]

"I have tried using the plot3 function but i cant get it going."

Please post your code an the error message or explain the difference between the results and your needs. Then it is much easier to post a matching answer.

Waht is a "current lq and ld"?

[Oliver-Maximilian Klein]

Iq = [0, 25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, 500, 525, 550, 575, 600];

Id = [0, 25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, 500, 525, 550, 575, 600];

Te = data{1,3}.Trq;

surf(Iq,Id,Te)

colorbar

thats the code so far. Iq and Id a currents which induce a magnetic flux in a stator from a permanent magnet synchronous machine. And the magnetic flux results in an electromagnetic Torque in the rotor. But that is no so relevant because i already have the resulting torque based from the currents Iq and Id stored in a matrix data{1,3}. With data{1,3}.Trq being a 25x25 matrix.I have tried transposing the vector Id, but it didnt help.

[Oliver-Maximilian Klein]

Error in surf (line 145)

hh = matlab.graphics.chart.primitive.Surface(allargs{:});

Error in Test (line 36)

surf(Id,Iq,Te)

Answer 1

[KSSV]

Read about surf.

Let Iq, Id be your vectors of size 1x25 and T be your torque matrix of size 25x25.

surf(Iq,Id,T)
colorbar

[Oliver-Maximilian Klein]

Iq = [0, 25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, 500, 525, 550, 575, 600];
Id = [0, 25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, 500, 525, 550, 575, 600];
Te = data{1,3}.Trq;
surf(Iq,Id,Te)
colorbar

thats the code so far. Iq and Id a currents which induce a magnetic flux in a stator from a permanent magnet synchronous machine. And the magnetic flux results in an electromagnetic Torque in the rotor. But that is no so relevant because i already have the resulting torque based from the currents Iq and Id stored in a matrix data{1,3}. With data{1,3}.Trq being a 25x25 matrix.I have tried transposing the vector Id, but it didnt help.

[Oliver-Maximilian Klein]

error code: Error in surf (line 145)

hh = matlab.graphics.chart.primitive.Surface(allargs{:});

Error in Test (line 36)

surf(Id,Iq,Te)

[KSSV]

If your Te is 25x25 matrix. It should not throw any error.

Iq = [0, 25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, 500, 525, 550, 575, 600];
Id = [0, 25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, 500, 525, 550, 575, 600];
Te = rand(25) ; % dummy data for demo 
surf(Iq,Id,Te)

To recity the error. I suggest you to atach your data.

[Oliver-Maximilian Klein]

Okay, i have found the problem. The data sheet for the resulting Torque had an entry like 8.55e04, which was interpreted like a name and therefore could not be plotted. Thank you for your help.

[KSSV]

Perfect.....thanks is accepting/ voting the answer.. :)

[Jan]

Some years ago we had some troubles with a user, who was too eager to earn points. Before this episode I've voted frequently for all answers, which contains working code or useful ideas. After seeing, how aggressive the chase for points can become, I reduced my voting. I do see a problem in the addiction potential of positive feedback in social media.

I did vote for your answer, although the terms "accepting" and "voting" occur in the comments, because your are obvioulsy stable and experienced.