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Spencer Chen


Last seen: 5 días ago
41 total contributions since 2016

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Answered
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...

5 días ago | 0

Answered
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...

5 días ago | 0

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...

5 días 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...

5 días ago | 0

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 ...

5 días 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_...

15 días ago | 0

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])...

15 días ago | 0

Answered
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...

15 días ago | 0

| accepted

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...

15 días ago | 0

Answered
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(:...

15 días 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...

15 días 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 = (...

15 días 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 ...

21 días ago | 0

| accepted

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...

21 días 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...

21 días 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

25 días 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...

25 días ago | 0

| accepted

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

alrededor de 1 mes 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...

alrededor de 1 mes 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...

alrededor de 1 mes 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...

alrededor de 1 mes 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...

alrededor de 1 mes ago | 0

| accepted

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

alrededor de 1 mes 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,...

alrededor de 1 mes ago | 0

Answered
Colormap overriden by new Parent figure
Still working on this problem if anyone has more suggestions. Attached is a screencap of my GUI with the panel on the left in t...

alrededor de 1 año ago | 0

Answered
Colormap overriden by new Parent figure
There must be a flag somewhere so the system knows whether to override the axes colormap with the figure colormap. I cannot find...

alrededor de 1 año ago | 0

Answered
Colormap overriden by new Parent figure
Thanks. I forgot about that. This works for my example. However, for some reason I'm still having trouble with colormap with m...

alrededor de 1 año ago | 0

Question


Colormap overriden by new Parent figure
I've encountered a strange problem with colormaps. When I transfer the "Parent" attribute of my axis to a new figure, then its c...

alrededor de 1 año ago | 4 answers | 0

4

answers

Question


Permanent panel of GoTo section list
In Matlab Editor, the GoTo toolstrip will give a list of sections that allows you jump to various locations of the script. Is t...

alrededor de 1 año ago | 1 answer | 0

1

answer

Question


NI PCIe-6353 for Simulink Desktop Real-Time OS X
I have a NI PCIe-6353 installed on a mac running OSX 10.10.5. I know there is not NI driver for this card, but since the Sim...

más de 1 año ago | 1 answer | 0

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