real matrix to input array to matlab script

[rebelstar]

Hi,

1) I was trying to input two array's to a matlab script. One is a 2x2 and the other one is 1x2. I am using Real Matrix for this purpose.

But i am getting some errors ( related to  matlab script ).

The problem is with the input  (Real Matrix).( because, if i give the same matrix inside matlab script, it works perfectly fine). 

Please have a look into the snap shot. Please let me know the correct usage of this.

2) How can i display 2 dimensinal graphs? ( I used Waveform Graph and chart) But did not get the output. 

Basicaly i am solving  pattern classification problems and want to display contour graphs. 

Thanks,

Kishore.

[altenbach]

It would be so much easier if you could attach the actual VI. Debugging an image is not that easy. 😉

[rebelstar]

Sorry 🙂

Please find it in the attachment.

[rebelstar]

Any help??/?

[smercurio_fc]

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rebelstar wrote:

Hi,

1) I was trying to input two array's to a matlab script. One is a 2x2 and the other one is 1x2. I am using Real Matrix for this purpose.

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Based on what I see from the picture both matrices are 2D. "Sigma" is 4x4 and "Real matrix" is 3x2. I think you're confusing the Index Display controls with the size of the array. Those numeric controls do not set the size of the array. They set which element is visible in the top-left corner. Please brush up on arrays and matrices in the LabVIEW Help

[rebelstar]

Hello,

Thanks for the reply, the problem is now overcome.

Also, i am still unclear about plotting the contour plot   equivalent in Labview 

In matlab i use the statement

 h = ezcontour(@(x,y)pdf(obj,[x y]),[-4 6],[-4 6]);

But this  returns a scalar quanity. I cannot use this from matlab scriptto plot the graph.

Is there something in labview which i can use?

Thanks

[rebelstar]

Help please !

[smercurio_fc]

The "h" return value is just the handles to the contour objects, so that's not going to do you any good.

As far as contour plots in LabVIEW, I've seen examples posted in the past, so a search should yield some possible methods. You would really need to look at them to see if they're close to what you're trying to achieve. 

[altenbach]

The 3D surface graph will allow you to select contours. Just pick the desired levels and set the view straight down along the z axis.