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# Simon Allosserie

##### Last seen: 4일 전
37 2020 이후 총 참여 횟수

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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...

5일 전 | 0

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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 ...

4달 전 | 0

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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

4달 전 | 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...

4달 전 | 1

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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...

4달 전 | 1

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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:...

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

4달 전

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

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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 ...

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Create a vector
Create a vector from 0 to n by intervals of 2.

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

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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 ...

4달 전

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Find max
Find the maximum value of a given vector or matrix.

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

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Inner product of two vectors
Find the inner product of two vectors.

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Arrange Vector in descending order
If x=[0,3,4,2,1] then y=[4,3,2,1,0]

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Given a and b, return the sum a+b in c.

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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]; ...

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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...

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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...

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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...

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Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

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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...

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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:...

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how to sort object properties at workspace window?
Just type app.property, e.g. app.Button3 to see that value.

4달 전 | 0

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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

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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...

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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...

4달 전 | 0

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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...

4달 전 | 1

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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...

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