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How to vectorize nested for loops

I am making a matrix B that represents a halve sphere in grayscale values. This means grayscale ~ height (so 0 = black = bottom ...

8 months ago | 1 answer | 0

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How to find percentage of white pixels in a binary image?

Hi You could simply use nnz(A), which gives the number of non-zero elements in the matrix A, and numel(A), which gives the to...

How to find percentage of white pixels in a binary image?

Hi You could simply use nnz(A), which gives the number of non-zero elements in the matrix A, and numel(A), which gives the to...

11 months ago | 0

| accepted

Answered

Converting coordinates (x,y) and radius (r) from pixels to mm using a calibrated camera intrinsic and extrinsic parameters

You can obtain the dpi of your image from the imfinfo structure dpi = imfinfo(filepath).XResolution %analogous for YResolution ...

Converting coordinates (x,y) and radius (r) from pixels to mm using a calibrated camera intrinsic and extrinsic parameters

You can obtain the dpi of your image from the imfinfo structure dpi = imfinfo(filepath).XResolution %analogous for YResolution ...

1 year ago | 0

Answered

How to create a line from a curve in a log scale x-axis

If your question is how to plot a log scale, please use set(gca, 'XScale', 'log') %make X axis logarithmic

How to create a line from a curve in a log scale x-axis

If your question is how to plot a log scale, please use set(gca, 'XScale', 'log') %make X axis logarithmic

1 year ago | 0

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I want to store text data on edit field when I press button on app designer Matlab

For your first question, create a Callback function for that button. I assume you have somewhere an input field where the desire...

I want to store text data on edit field when I press button on app designer Matlab

For your first question, create a Callback function for that button. I assume you have somewhere an input field where the desire...

1 year ago | 1

| accepted

Answered

Prime number sum from cell array

There are a few issues. I wouldn't change characters to NaN but rather to an empty cell. After your cellfun and filter1, myArr...

Prime number sum from cell array

There are a few issues. I wouldn't change characters to NaN but rather to an empty cell. After your cellfun and filter1, myArr...

1 year ago | 1

| accepted

Answered

how to take the derivative of the function saved from curve fitting tool

If you have the values of your fitted curve saved, you can calculate the first derivative by using the gradient function: https:...

how to take the derivative of the function saved from curve fitting tool

If you have the values of your fitted curve saved, you can calculate the first derivative by using the gradient function: https:...

1 year ago | 0

Solved

Pizza!

Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

1 year ago

Solved

Vector creation

Create a vector using square brackets going from 1 to the given value x in steps on 1. Hint: use increment.

1 year ago

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Doubling elements in a vector

Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...

1 year ago

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Whether the input is vector?

Given the input x, return 1 if x is vector or else 0.

1 year ago

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Flip the vector from right to left

Flip the vector from right to left. Examples x=[1:5], then y=[5 4 3 2 1] x=[1 4 6], then y=[6 4 1]; Request not ...

1 year ago

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Get the length of a given vector

Given a vector x, the output y should equal the length of x.

1 year ago

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Column Removal

Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; ...

1 year ago

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Select every other element of a vector

Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

1 year ago

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Triangle Numbers

Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

1 year ago

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Make a checkerboard matrix

Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Examp...

1 year ago

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Make the vector [1 2 3 4 5 6 7 8 9 10]

In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

1 year ago

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Times 2 - START HERE

Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

1 year ago

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how to sort object properties at workspace window?

Just type app.property, e.g. app.Button3 to see that value.

how to sort object properties at workspace window?

Just type app.property, e.g. app.Button3 to see that value.

1 year ago | 0

Answered

How I can perform a canny edge detection on this image ? It can be used for hand gesture recognition in real time or is just for images

Please refer to https://nl.mathworks.com/help/images/edge-detection.html for loading an image & running an edge detection algori...

How I can perform a canny edge detection on this image ? It can be used for hand gesture recognition in real time or is just for images

Please refer to https://nl.mathworks.com/help/images/edge-detection.html for loading an image & running an edge detection algori...

1 year ago | 0

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Answered

ERROR SELECTING MULTIPLE FILES

The moment you select multiple files, file becomes a cell array. Just run this in your command window and select a few files to...

ERROR SELECTING MULTIPLE FILES

The moment you select multiple files, file becomes a cell array. Just run this in your command window and select a few files to...

1 year ago | 0

| accepted

Answered

Creating a colormap for an image

You will probably want to use something like a jet colormap. See this page for more details: https://nl.mathworks.com/help/matla...

Creating a colormap for an image

You will probably want to use something like a jet colormap. See this page for more details: https://nl.mathworks.com/help/matla...

1 year ago | 0

| accepted

Answered

How to make the last iteration of a for loop run differently?

You can do something like this for i = 1:number % do the things that have to happen for each iteration if i < thelast...

How to make the last iteration of a for loop run differently?

You can do something like this for i = 1:number % do the things that have to happen for each iteration if i < thelast...

1 year ago | 1

| accepted

Answered

Best practise for quickly changing parameters of a function?

For each number you want to change regularly, make it also an input parameter to your function. Then, you can write a little sc...

Best practise for quickly changing parameters of a function?

For each number you want to change regularly, make it also an input parameter to your function. Then, you can write a little sc...

1 year ago | 0

Answered

How can I plot this small set as a beautiful histogram?

You are not making a histogram if you want to have the height of the bars equal to the value. You are making a bar graph. This s...

How can I plot this small set as a beautiful histogram?

You are not making a histogram if you want to have the height of the bars equal to the value. You are making a bar graph. This s...

1 year ago | 0