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# Alan

Last seen: 3 months ago Active since 2020

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Question

rectangle invisible in matlab
Hi all, I draw a rectangular in a figure by the code, roi = drawrectangle('color','r','linewidth',2); And now I want to set t...

4 months ago | 2 answers | 0

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Question

How to control the pushbutton in a while loop in Matlab GUI
Hi all, I am now writting a pushbutton callback function by using a while loop like below while i > 0 ; var = get(handles. ...

4 months ago | 1 answer | 0

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Question

3D surface plot
Hello, I have plot a 3d figure. But the height on the z-axis looks like a flat 2d surface. How can I plot the height and ma...

11 months ago | 1 answer | 0

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Question

dot product between two different size of matrix
Hello, I have two matrix, one is A (1by 3 matrix), the other one is B (86 by 3 matrix). And I would like to calculate the dot p...

12 months ago | 2 answers | 0

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Question

how to find the row number of the input 3d data from 86 millions of table data?
Hello, I have a table data with 86 millions of rows and 8 colums. The columns 1,2,3 are a 3d data points(size_1,size_2,size_3)....

12 months ago | 1 answer | 0

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Question

plot an arc between two points
Hello, I have two 3d points on a unit sphere, which are A1(x1,y1,z1) and A2(x2,y2,z2). I want to connect A1 and A2 points and d...

1 year ago | 1 answer | 0

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Question

I have two 3d points, A(1,0,0) and B(0,1,0). And I connect these two points as a line AB. How to divide this line into 10 equally segments and get their coordinates?
Hello, I have two 3d points, A(1,0,0) and B(0,1,0). And I connect these two points as a line AB. How to divide this line into 1...

1 year ago | 3 answers | 0