SungJun Cho

Last seen: 5 Tage ago

13 total contributions since 2021

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Answered
Define a variable?
The red underline occurs when you have not preallocated your array (or matrix). You can just do k = zeros(1,n); for i = 1:n ...

5 Tage ago | 0

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Question

Understanding CWT Morlet: Time and frequency resolution
Hello all, I have been using a continuous 1-D wavelet transform (MATLAB cwt function) to compute and plot wavelet scalograms. F...

etwa 2 Monate ago | 1 answer | 0

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answer

Answered
how to count the number of occurrences of these numbers (with some conditions)
Hi, The code below should solve your problem. A(1,:) = [1,2,5,2,1,2]; A(2,:) = [0,1,1,0,1,0]; uA = unique(A(1,:)); answ...

2 Monate ago | 0

Solved

Find last zero for each column
Given a numeric array of arbitrary size, return the row index of the last zero for each column. If a column contains all nonzero...

2 Monate ago

Solved

Find the longest sequence of 1's in a binary sequence.
Given a string such as s = '011110010000000100010111' find the length of the longest string of consecutive 1's. In this examp...

2 Monate ago

Solved

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:...

2 Monate ago

Answered
Pre-allocation issue non existent before
First of all, when I ran your code, Avg_saving outputs 1 x 200 double array, so you might want to preallocate the arrays in righ...

2 Monate ago | 0

Answered
how do I put arrays into a for loop
To calculate the mean of the first N elements of an array, you can use mean_y1 = mean(y1(1:N)); However, you may import a .ma...

2 Monate ago | 0

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Answered
Changing a a value in table column dependent on another column.
You can just do e = [ 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 78 78 78 78 78 78 78 78 78 78]; e = e'; d = [ 2 2 2 2 2 2 2 2 2 2 2 2 2 ...

2 Monate ago | 0

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Answered
Find the index range of ones/trues?
I made a brief function that gives you a two-column matrix of the start and end indices when a logical vector is given as an inp...

2 Monate ago | 0

Answered
how to extract data from .mat file?
If you want to extract first 10000 elements from the x, you can just do extracted_x = x(:,:,1:10000); % Or if you want specifi...

2 Monate ago | 0

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Answered
How to know which loop is being calculated?
Hello, To find out which step the loop is processing, you can always click pause and check "k" and "j". However, you can also ...

2 Monate ago | 0

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Answered
Morlet wavelet: what is the difference between 'morl' and 'amor' wavelets?
Hi Maja, It seems quite late to answer your question, but to simply put, the difference between 'morl' and 'amor' wavelets lies...

3 Monate ago | 0