# Jeffrey Clark

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**Content Feed**

How to plot a second coordinate frame using plot3?

@Jimmy Neutron, your Z rotation matrix doesn't agree with your Z rotation formula. Either could be correct depending if you want...

alrededor de 4 horas ago | 0

How to solve this issue?

@Nisar Ahmed, I think what you want to do to have Simulink outputs grouped across multiple runs is something like the example in...

alrededor de 17 horas ago | 0

Error in finding phase noise of an electrical oscillator...

@khan, my guess is that your data frequency is not compatible with the other parameters; the example looks at a signal of 2.7G a...

6 días ago | 0

| accepted

Submitted

Utility package with NoGrow class and realDeal function

Utilities I find useful: NoGrow superclass to detect and/or prevent growth of arrays; and realDeal to augment MATLAB deal functi...

9 días ago | 1 download |

Looping if between 2 numbers

@jason, the and operator (&) produces a logical (true/false 1/0) result - not a range of values. Please look at MATLAB documenta...

11 días ago | 0

How to assign to a collection of object properties stored in an object array, using a numerical array of compatible type and size (one statement, without for-loop!)?

@Peter, without getting into your specific code I suspect that [obj.objArray(IndexSet).tstmp] = T(1:nI) is incorrect in that the...

11 días ago | 0

| accepted

How to shade the same area in each subplot in a 5x1 Figure?

@S_G, if you use debug to step thru the code you will see that the 2nd subplot initially gets the shading, but then line plotted...

15 días ago | 0

How to solve 'Error using image Complex values are not supported. Specify the color data as numeric or logical values.'

@Nisar Ahmed, I don't have the toolbox for ksdensity but the imaginary parts of SW_OPT are insignificant relative to their real ...

17 días ago | 0

| accepted

How can I evaluate an Simulink.data.Expression in a MATLAB script

@Karsten Gordon, Evaluate MATLAB expression in data dictionary section - MATLAB evalin (mathworks.com) or Evaluate MATLAB expres...

17 días ago | 0

How can I read data in backgorung from my NI hardware?

@Jan Tomaszewski, try moving the device setup into your main program and pass that dq (and maybe ch3) as a parameters to the wor...

17 días ago | 0

My snipet code have 3 harmonics, second's amplitude is maximum, but abs(fft(X)) returns first as maximum. I use MATLAB R2022a.

@Georges Theodosiou, you don't have enough samples to easily interpret the abs(fft), if you change Segm = 1:2048 to use 16384 yo...

18 días ago | 0

| accepted

fill value that has different size of array

@상훈 송, trying to save results directly into part of an array will not work unless you know exactly what the size of the return w...

20 días ago | 0

| accepted

Converting a list of binary numbers to a decimal numbers

@Martin Mittrenga, read up on num2str and strsplit which don't really support vectors of things. One way to do this without loop...

alrededor de 2 meses ago | 0

Fast fourier tranformer for Time series data

@Mohammed Lamine Mekhalfia, I think the answer provided by @dpb is valid although @Bjorn Gustavsson has valid points as well. By...

alrededor de 2 meses ago | 0

is this expression right in MATLAB?

@Aisha Mohamed, what you are looking for is known as a Laurent polynomial - Wikipedia. The MATLAB Wavelet Toolbox has functions ...

alrededor de 2 meses ago | 0

How to evaluate the computation time of some codes in parallel properly?

@Slivery, when using the cputime difference method don't forget to divide by 21 (the number of executions being averaged). Depen...

2 meses ago | 0

| accepted

I want to find unique value(s) based on a given conditions

@Tulkkas, this should do it (I added a randomize of your sorted data since first, if it would always be sorted skip as indicated...

2 meses ago | 0

| accepted

Need help understanding rescale()

@Adrian Velasquez, according to rescale documentation each element should be rescaled to [0..1] using this method: l + [(A-...

2 meses ago | 0

| accepted

spline for corner object

@Mehri Mehrnia, use Transform Cartesian coordinates to polar or cylindrical - MATLAB cart2pol (mathworks.com) and sort by theta ...

2 meses ago | 0

| accepted

Why am I not getting desired values using loop?

lbr = length(br_peaks); points = nan(lbr,7); % each row is 1->lbr; cols for a row are nan filled % could ...

3 meses ago | 0

| accepted

Why am I getting this error when trying to logically compare 2 arrays inside of a struct of the same length

@Bolaji, I believe that with each of the statements data(MainRawFilt).(dataNames{k}) = [] you are reducing the size of data.(dat...

3 meses ago | 0

preallocating memory without storing numbers

@Philine Baumert, given that your issue is with code using the end index into arrays which by default won't work correctly with ...

3 meses ago | 0

| accepted

When subclassing "double" with new properties, is there an easy way to access the data value?

@Robbie, see Subclasses of Built-In Types with Properties - MATLAB & Simulink (mathworks.com) Sorry but the subsasgn and subsre...

3 meses ago | 0

| accepted

I am trying to solve for OS here, but keeping getting pi/2 even when I change L

@adam puchalski, you need to limit fsolve such that it doesn't attempt values that cause sqrt(cos(initial)-cos(theta)) to return...

3 meses ago | 0

Using "for" loop for summation of matrix product

@Nir Vaishnav, you don't say what any of the iputs are, but since kron will produce a matrix (unless both inputs I and bk are ei...

3 meses ago | 1

| accepted

preallocating memory without storing numbers

@Philine Baumert, keeping others in the dark doesn't shed any more light on finding what's hidden. So an answer doesn't seem pos...

3 meses ago | 0

How to separate waves from a signal

@Abdelhakim Souidi , I couldn't determine if you had the data or just an image to work with. If you are working with just an im...

3 meses ago | 0

Trying to model the dynamics of the non-regulated construct and the auto-regulated construct using the Gillespie algorithm, do you know why it doesn't reach 200 and stay?

@Jonathan Louie, I believe your deg_rate=k*x_nr should just be deg_rate=k.

3 meses ago | 0

Subtracting equal elements of one array from another array of a different size

One way to allow MATLAB to compare different sized vectors is to have one be a column and the other be a row. Assuming we are st...

5 meses ago | 1

| accepted

How can I save the output of a for loop onto the same column, when each iteration gives me an answer of different heights?

Store the itteration results in a cell array (not the default doubly type array you are using); see Cell array - MATLAB (mathwor...

5 meses ago | 0