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Spencer Chen


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47 total contributions since 2016

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Question


Programmatically change UDP Packet Output IP: Desktop Real-Time
Hi, I have a Simulink desktop real-time model that has a Packet Output set up to do UDP. I want to be able to set it up so it i...

9 months ago | 0 answers | 1

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answers

Answered
Row combination for repeated values
Now, you were not very clear on your column structure. I understand it as in: A = [date.depth1, date.depth2 .. date.depthNtime,...

11 months ago | 1

Answered
How to generate random matrix of 0 and 1 of distinct rows?
I don't know if there are any. But it's easy to write one for your specific case where you only have 5 columns. That is quite m...

11 months ago | 0

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Answered
Linking pushbuttons to a callback function
I think the problem may lie in that you have nested your functions such that selectionChanged() is a nested function of AND1(). ...

11 months ago | 0

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R2015a plot problem with ticklabel definition
Well, you have set you ytick labels to: num2str(y2(:), '%0.1f') Maybe you meant? num2str(linspace(-0.8,0.8,5), '%0.1f') Bles...

11 months ago | 0

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Problem while creating a gui and to share variables via assignin
What do you mean by "pass them to other functions"? Do you mean access of variable_1 by plotButtonPushed()? When you set the ca...

11 months ago | 0

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Saving values from a for loop into an existing matrix
This might be your problem: for i = num_nd ... This code does not give you a proper for-loop. I'll leave you pondering on the...

11 months ago | 0

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How to generate all possible combinations of audio files?
If you have to use nchoose(), then something like this would work: combinations = nchoosek(SoundNames, 2); for i = 1:size(comb...

11 months ago | 0

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Answered
How can assign a color channel to an image series?
1) What you want to achieve get is probably something like this: RGBimage=cat(3,grayimage,zeros(size(grayimage),'uint16'),zeros...

11 months ago | 0

Answered
How to extract multiple number data after the same specific string from a .txt file?
Something like this should get you started: txt = fileread('test.txt'); txt = splitlines(txt); for ii = 1:numel(txt) if st...

11 months ago | 0

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Answered
Taking in 2 array variables, my output variable is a single number rather than an array. Any suggestions to get my output in an array?
I guess you probably want to use the: A ./ B operation instead of the straight divide "/". Also as a recommendation, break ...

11 months ago | 0

Answered
Rename a variable within global (function in function)
Simply assign it to another variable. global evil_global_var; saved_evil_global_val = evil_global_var; evil_global_var = new_...

12 months ago | 0

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Answered
How to get rid of the 1/f in EEG data?
polyfit() is not for estimating 1/f functions. Something like this is more appopriate: fout = fit(x,y,'(a/x)^b','Lower',[0 0])...

12 months ago | 0

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optimizing my code using vectorization methods or avoiding for loops
I would first use the "profile" function to check which part of the code is actually taking a long time. Then tackle those lines...

12 months ago | 0

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Answered
how can i solve this problem?
Maybe this will get you started. You already have in your code an example of a for-loop. To put Np into a loop, you can construc...

12 months ago | 0

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How to find conditional unique value in matrix
Maybe this will get you started: ux1 = unique(x(:,1)); % Find your unique order numbers for xx = 1:numel(ux1) idx = x(:...

12 months ago | 0

Answered
How to find the Y Value in a Array and Locate corresponding X Value
You are on the right track. Let's start with: X=find(x1(i)~=x4(i)); Indexing into x1 and x4 is your problem here. Think abou...

12 months ago | 0

Answered
Adi is set to 0 when i = 1
Not sure what you are trying to do with Adi. If you solve the mathematical formula: Adi = ((Vd + 1)-(Vd - 1)/(2*(.1)); Adi = (...

12 months ago | 0

Answered
Force nansum to equal NaN (and not 0)
Try: returnMarket(all(isnan(omega)&isnan(retSize1Value1),2)) = NaN; You need to run all() on dimension 2 instead of dimension ...

12 months ago | 0

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Answered
Why do i keep getting this error???
It's hard to determine the exact problem with the information you have provided. It would be much better if you had copy and pas...

12 months ago | 0

Answered
Colormap: ColorScale options other than linear and log (power norm, etc)
I do not think there is native Matlab feature to do that. You can convert your data into your desired log function and plot it o...

12 months ago | 0

Answered
create a matrix from matrix with zeros elements
You can create a new matrix of the same size: B = zeros(size(A)); Then assign non-zero data in B. Blessings, Spencer

12 months ago | 0

Answered
Issues with polynomial fit
You are fitting an order-1 polynomial, i.e. linear, so it is a bad fit. Try higher orders. But it looks like a different functio...

12 months ago | 0

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Answered
set Precision in lsqcurvefit
Check out: doc optimoptions I think something like OptimalityTolerance is what you are looking for. Blessings, Spencer

12 months ago | 0

Answered
Data type conversion help
First of all, assuming that your Rpt_row_sel is a table, then Rpt_row_sel(:,2) will also output a table, which cannot be compare...

12 months ago | 0

Answered
Write cell data to excel or text file in a specific format
I'm afraid that you are not clear enough for me regarding the original format of the data, so I can only guess. If you just wan...

12 months ago | 0

Answered
Plotting Points at Specified Index Values
Let's separate your problem into 2 parts: (1) Plotting problem. (2) Finding location of you Maximum on the xGrid2. I'll start w...

12 months ago | 0

Answered
Index in position 1 exceeds array bounds (must not exceed 1)
Try instead: layl=scanvecs{l}; Note the curly brackets to extracting the content of the cell at the indexed position. Using r...

12 months ago | 0

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Answered
Add 0.5 *0.5 degree grid on figure (country)
You can set the XTick and YTick properties of the axis. Blessings, Spencer

12 months ago | 1

Answered
Cell2table header transfers
Your Test_cell format is not compatible with the SM_C table you have in Annoation.jpg. To add a new field to an existing table,...

12 months ago | 0

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