Answered
NI-DAQ device working on some PCs but not others
Have you tried uninstalling completely and reinstalling the NI-DAQ Data Acquisition Toolbox ? I have encountered troubles with ...

3 years ago | 0

Answered
How to remove more than K consecutive NaN values from row matrix
K=2; x = [1,2,3,4,NaN,NaN,NaN,7,8,9] ; indexes=strfind(isnan(x), true(1,K+1)); x(indexes)=[]; (edited according to the comme...

3 years ago | 0

Answered
Fit a line on a plot (imagesc)
contrast_line = diff(image); imshow(contrast_line); % shows the line thresholded_image=mean(contrast_line,3) > 240; % set here...

3 years ago | 0

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Issues with plotting/best method
short answer: you are plotting points singularly so you can't see them short solution: pool them together in arrays then use th...

3 years ago | 0

Answered
readFrame is only reading half of of my video frames
it is probably because the frame rate of the video is detected as 15 fps v=VideoReader('crosswalk.mp4'); t=0; while hasFrame(...

3 years ago | 1

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Answered
moving an image across the screen along some vector path
try using circshift https://de.mathworks.com/help/matlab/ref/circshift.html

3 years ago | 0

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How to segment wbc using k means clustering (I=4)
wbc ? white blood cells ? use regionprops (https://de.mathworks.com/help/images/ref/regionprops.html) on a binary image

3 years ago | 0

Answered
Extract non-touching regions from image
You can try using imerode on the blobs. eroded_image = imerode(binary_image,[1 0 1; 1 0 1; 1 0 1]); % this will "shrink" the im...

3 years ago | 0

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how to plot a contour plot with excel data??
from the folder containing your excel file run the error about Z may be related to the fact that contour is waiting for a missi...

3 years ago | 0

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How to label your peaks in descending order?
something like this ? my guess is that you won't need the sortedX because you are looking for peaks on your Y axis, right ? But...

3 years ago | 0

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Answered
Frequency response signal - resonce frequency
Based on the info provided I came up with this, you basically have to use the pwelch function and set some sampling rate (which ...

3 years ago | 0

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Question

losing CData after replotting image in subplot ?
I am making a montage of image panels, which look like BW but are not binary. I am then taking the CData of the montage and , ...

3 years ago | 1 answer | 0

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Answered
How can I get a loop to process all ".avi" files in a folder, then produce the corresponding ".txt" and ".png" file?
clear; close all; [logfname, pathname] = uigetfile('*.mat','Pick any AVI file'); cd(pathname); %make list of AVI files in t...

3 years ago | 0

Question

control stepper motor using MATLAB and Arduino
I am trying to set up a stepper motor connected to an Arduino Uno with motor shield mounted on it. The motor works through Ardu...

3 years ago | 0 answers | 0

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Question

change table var type
How can I change the variable type in a table from double to string ? I found plenty of posts with the same issue but during i...

3 years ago | 2 answers | 0

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Question

can't install NI-DAQmx toolbox on MATLAB 2020b
Just got a fresh new installation of MATLAB 2020b with server license on campus. I am trying to install the Data Acquisition To...

3 years ago | 5 answers | 0

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Answered
How can i make vector lengths the same?
To solve a similar issue I use imresize First get the size of the image (with the function "size"), then resize image 2 accor...

3 years ago | 0

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Question

can I have independent analog output and digital counter output in the same session ?
Hi everyone I have a setup with both recording and stimulating electrodes. I would like to record the effects of a certain stim...

3 years ago | 0 answers | 0

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Answered
How to get pixel index / x,y coordinates of bright regions?
binarize the image, use regionprops, get the PixelList properties and use bwconncomp to identfy separate objects in the selecte...

3 years ago | 0

Question

How to match pixel locations to blob identity with region props
I am using regionprops to identify blobs in a binary image. I am able to detect a couple of blobs, get their centroids and all t...

3 years ago | 1 answer | 0

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answer

Question

how can I trace a ROI with fixed size on multiple images ?
I am trying to register images from a stack. they are frames taken from a video in which an object is moving. I tried to use the...

3 years ago | 0 answers | 0

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Answered
How do you send a digital signal as an output to NI DAQ system?
See the properties of your daq by typing its device name in command line. See how the channels are called and which types you ha...

4 years ago | 0

Answered
Matlab crashes every time I copy a (even small) number of blocks to my Simulink model
Are you running Matlab with admin rights? I experienced similar issues when I wasn't. See if it works.

4 years ago | 0

Answered
Using APP designer to communicate with the GIGE camera
You can combine VideoReader function with image binarization and extract "blobs" of a desired frame at a time. From the blobs Ma...

4 years ago | 0

Answered
How to swap between X, Y and Z in 3D plot
the function permute rearranges the order of the axes. S = permute(S,[1 2 3]); S1 = S = permute(S,[3 1 2]); % swapped matrix

4 years ago | 0

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how do you count points on a graph
use getpts https://de.mathworks.com/help/images/ref/getpts.html

4 years ago | 0

Answered
Power Spectra estimation after FFT
try this example: sampling_freq = 5000 window = 8192, noverlap = 4096, nfft = 8192, [p,f] = pwelch(your_signal, 8192,409...

4 years ago | 0

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Question

error in matlab arithmetic operations ?
I am puzzled by the result of this operation in matlab: I have a var that equals 3 I am trying to calculate (var-1)*60 instea...

4 years ago | 1 answer | 0

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Question

add row to table in app designer - works ... but not completely
I am trying to add rows to a table by clicking a button in a GUI the code is as follows: the table is first initialized through...

4 years ago | 1 answer | 0

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answer

Question

how to add a single element to a table in app designer ?
this line adds one element to the first cell of the table (if the content is numeric) app.UITable.Data = [app.UITable.Data(:);a...

4 years ago | 1 answer | 0

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