# Benjamin Thompson

**Programming Languages:**

C++, C, MATLAB

**Spoken Languages:**

English

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**Content Feed**

fft2 results don't match the analytical Fourier transform results

Your problem is 201 by 201 samples in size? Making the size a power of 2. So use 256.

17 giorni fa | 0

Real Time Low Pass Filtering

All digital filters working in real time must have some delay, this is a law of filtering in general. The amount of delay depen...

circa 2 mesi fa | 0

Image analysis for speckle pattern

It is possible, try looking over this example: https://www.mathworks.com/help/images/correcting-nonuniform-illumination.html ...

circa 2 mesi fa | 0

How to break data in to groups using while loop?

Even better, use the vectorization features in Matlab to count NaNs in each row all at once. nanCounts = sum(isnan(matrix),1); ...

circa 2 mesi fa | 0

Replacing specific block with subsystems

Here is one way. I think you would just use a constant block rather than From Workspace because From Workspace is looking to us...

2 mesi fa | 0

| accettato

I need to know how to use the for command to calculate y=2/x

x = 1:10; y = 2 ./ x;

4 mesi fa | 0

How do I re-use values calculated in a while loop?

Theta1 and Theta2 have not been defined and given a value at the first reference. You should assign an initial value to Theta1 ...

4 mesi fa | 0

How do i find the RGB values of color image in range 1 to 255

If the image is stored in MATLAB as a three dimensional array, which is the usual, then the red/green/blue channel is the third ...

4 mesi fa | 0

How to create these shapes in Matlab

Where is the m-file referenced in the problem statement? That would probably help on some of the coding structure questions. Y...

4 mesi fa | 1

| accettato

Measurement of properties from Tiff image

If you are using the Image Processing Toolbox then you are probably trying to use the regionprops function with the "Area" prope...

4 mesi fa | 0

Not able to use the if condition as desired in simulink

You need to use the "if action" subsystem along with the "if". See the example in the documentation: https://www.mathworks.com...

4 mesi fa | 0

| accettato

How to copy 30K images from folder to another according to the names in train and test text listes

Use copyfile to copy a file to a new location. You could probably use arrayfun to more quickly add the full file path to the fi...

4 mesi fa | 0

Finding average data from a large data matrix

An index vector over the available columns would work well here. Cannot be sure without a complete example of the data. Then p...

4 mesi fa | 0

| accettato

Coalesce data from 1000 monte Carlo simulations with different data file lengths?

With the data import tool you can generate a function like this. It needs some editing to handle some of the odd formatting of ...

5 mesi fa | 0

Avoid a "loop for" to add multiple "datetime" elements to a cell array

If you can make is an N by 1 cell array and do the assignment using parenthesis indexing and num2cell, then convert that to the ...

5 mesi fa | 0

Create Integral, Differential, timer and counter blocks from basic blocks in simulink

You can use a Memory block, subtraction block, and gain block to approximate a differentiator, implementing the equation dx/dt =...

5 mesi fa | 0

How to make the flow diagram with if or any hint in Simulink?

A Stateflow chart is usually the best way to model a state diagram in Simulink. Try following the Stateflow Onramp training too...

5 mesi fa | 0

How to get the equation of irradiance varying in time for a PV model under partial shading conditions?

Simulink has a 2D lookup table block with various options for interpolation, extrapolation, and fitting. With the two inputs be...

5 mesi fa | 0

Hold the value of a signal

You can use the signal builder block to define any type of piecewise continuous signal you want.

5 mesi fa | 0

How to pass an input value to a Simulink block from M-file?

Your M file can put the data into the base workspace as a variable with a known name. Then your Simulink model can use the From...

5 mesi fa | 0

| accettato

How to change the color of each pixel in a masked image?

See if this helps. There is probably a faster way to do it with color mapping functions in the Image Processing Toolbox but it ...

6 mesi fa | 0

I gave the initial condition correctly still the program not working.

circshift returns a vector of the same length as its input. So, j2, j5, j8, and j19 are vectors and not scalar values as the li...

6 mesi fa | 0

How can I merge two structs?

Due to the need to merge it might be easiest to use struct2table, table2timetable, make sure it is merged well as a time table, ...

6 mesi fa | 1

Displacements and velocity from acceleration integration (accelerometer data)

The Simulink Onramp training course is a good place to start: https://www.mathworks.com/learn/tutorials/simulink-onramp.html?...

6 mesi fa | 0

GUI window to manually register two images?

You can try the registrationEstimator app included with the Image Processing Toolbox.

6 mesi fa | 0

how to run a simulation at different times

You can use the Signal Builder block to configure how you want a signal to change over time. I assume you are simulating the mo...

6 mesi fa | 0

Browsing the subsystem inside model using mscript

You can use open_system to open a Simulink model to some subsystem inside the model. The second parameter to open_system should...

6 mesi fa | 0

| accettato

Load array into Simulink model from file without timestamps

If you define your matrix as a Simulink.Parameter in a data dictionary and link to that data dictionary from your model, that wo...

6 mesi fa | 0

How can I convert double to const real_T of a sfunction?

If x is a constant you cannot change it. You would need to supply a more complete example, it is hard to tell what you are tryi...

6 mesi fa | 0

Simulink code generation for tcpclient

Looks like code generation support for tcpclient was added in R2019B. You may just have a configuration issue in your R2020A te...

6 mesi fa | 0