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David


Active since 2011

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Question


instantaneous phase angle plots?
Hello, I'm struggling with this last part of an instantaneous phase angle plots. I know how to get the phase angle yh=hi...

8 years ago | 1 answer | 0

1

answer

Answered
Record timing of user input
wow that was very fast. thank you guys very much!!! this worked immediately.

11 years ago | 0

Question


Record timing of user input
Hello and thank you for reading my question, I'm trying to display images and record the timing (and keyboard value if pos...

11 years ago | 3 answers | 0

3

answers

Answered
instantaneous phase angle plots?
ack! i just had to zscore normalize my signal! thankyou

11 years ago | 0

| accepted

Question


Lab vs RGB vs HSV color spaces for color detection?
I'm having trouble understanding why there exist multiple color spaces. That is, informatically, all three spaces have the same ...

11 years ago | 1 answer | 0

1

answer

Question


how do I make a color (rgb) image look grayish?
how do I make a color (rgb) image look grayish? not grayscale per se, but iteratively "washout" the color? I basically want to m...

11 years ago | 2 answers | 0

2

answers

Question


Real-time video capture with frame by frame comparsion
Hello, I would like to capture video using a computer camera (usb) and compare consecutive frames (i.e. get diff). I got the ...

11 years ago | 1 answer | 0

1

answer

Question


Using PPM (Prediction with partial match) for predicting next symbol in sequence.
I'm trying to under the use of the PPM (Prediction with partial match) algorithm to predict the next symbol in a sequence of sym...

11 years ago | 0 answers | 0

0

answers

Question


Warp just a subset of a plot
Hello, I'm trying to warp and move around aspects of a plot. I'm using Doug's George body figure. http://blogs.mathwork...

12 years ago | 1 answer | 0

1

answer

Question


maximal subset N of binary matrix
Hello, i have a 200x200 symmetric binary matrix that's relatively sparse. I want to choose a subset N of rows with their matchi...

12 years ago | 2 answers | 0

2

answers

Answered
rotation about a point
i found my error and here's the solution. thanks again for all your help! clf xx = 0 yy = -0.7 t = pi/4; A = [cos(t) ...

13 years ago | 0

| accepted

Question


rotation about a point
hello community, I'm slowly losing my mind trying to do something rather simple. I would like to rotate set of 2-d points ab...

13 years ago | 3 answers | 0

3

answers