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how to sum a vector without sum function

Your idea of using for loop is correct but you should use it to calculate the sum not the mean. If there's a vector A = [1,2,3,...

presque 3 ans ago | 1

automatically create a group of same elements from an array

try this, result =mat2cell(sort(A),1, histcounts(findgroups(A))) %A is your array Output is a cell array where you have...

presque 3 ans ago | 0

can anyone help me to change the numbering in y axis to some names, say 'X', 'Y','Z' ?

Just like how you've handled the X-Axis, set(gca,'YTicklabel',{'X','Y','Z'})

presque 3 ans ago | 0

| accepted

I have data in the same excel workbook but in 10 different work sheets and i'm trying to run a loop that will read in the data from each work sheet consectutively.

You could use |xlsread| along with |xlsinfo|. [status,sheets] = xlsfinfo(filename); Now, you have all the sheet names un...

presque 3 ans ago | 0

| accepted

How can I use 'strcat' and 'for loop' to read my Excel data?

There are better ways to handle multiple files in MATLAB. But the main problem in your attempt is that you're not only trying to...

presque 3 ans ago | 1

| accepted

Assign matrix to struct

probably you mean something like this g.a(:,1)=[1 2 3 4]'; g.a(:,2)=[1 1 3 4]'; g.a(:,3)=[4 3 1 2]' c=[1 2] b=[...

environ 3 ans ago | 0

How to change cell arrays to 3D arrays in order to speed up calculations?

Convert |x| into a 3d matrix using x_mat = cat(3,x{:}); and then if you want to extract 5th row from all the pages, x...

environ 3 ans ago | 0

how to get the all possible combination between two range of numbers

The example and description is a but confusing but if you ask _how to get the all possible combination between two range of numb...

environ 3 ans ago | 0

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cell mean from each cells

It doesn't matter how many lines each cell has. Probably you want something like, C = {rand(50,7),rand(30,7),rand(100,7)}; %...

environ 3 ans ago | 0

Cell array to Matrices

Use 3D matrices, it's a better idea. C_mat = cell2mat(permute(C,[1,3,2]))

environ 3 ans ago | 0

Can I reference dates, instead of element index numbers, when referencing a time series?

Use the dates to extract the desired indices. Look at the following example, % Create some dummy data t = datetime([2018 1 ...

environ 3 ans ago | 0

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Extracting the data from a column vector according to mod

Instead of creating multiple variables, why not simply reshape your vector into a matrix? x = (1:20); reshape(x,4,[]) an...

environ 3 ans ago | 2

Calculate the mean of two dimensions in a 3D array

If you want the mean of all rows in every page(3rd dimension) mean(ImageROI,1) for columns in every page mean(ImageRO...

environ 3 ans ago | 0

Summing elements of an array

sum([P{:}]) But why would you store it in cell array? If they are all numeric, better use a numeric array.

plus de 3 ans ago | 0

Adding elements of a matrix

I'm not entirely sure what you want but if you want to calculate mean of all the RGB numbers and have 1x3 result, mean(cell2...

plus de 3 ans ago | 0

Loop through a vector with changing legth

why not use a while loop? idx = 1; while idx<=numel(z) %do something z = z(abs(z-z(idx)>=1)); idx = idx+1; ...

plus de 3 ans ago | 0

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how to solve the error "Not enough input arguments."

It's a *function*. You should call it by output = convert2GPS(input) Keep in mind the size of input. link: <https://ww...

plus de 3 ans ago | 0

How to repeat sample data in minutes?

Your variable name looks like you're working with irradiation, in that case I wouldn'r recommend interpolation for your simulati...

plus de 3 ans ago | 1

Removal of values from cell arrays

If all your arrays have consistent dimension, it's a lot simpler. Not very different from the other answer though, just with cel...

plus de 3 ans ago | 1

import csv into mate

You're overwriting A everytime. Before you start the loop define A as a cell array, A = cell(numFiles,1) and then inside ...

plus de 3 ans ago | 0

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Add zeros to matrices same as length of another matrix

_can I add zeros to the bold 360x3 matrix to make it 369x3 in one go?_ You say you want to add *9 rows* but you are trying to...

plus de 3 ans ago | 0

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Read data from file

Something quick, d = readtable('whole res.txt'); d = table2cell(d); d = regexprep(d,' ',''); d = cellfun(@str2do...

plus de 3 ans ago | 0

Index exceeds matrix dimensions help

There are so many issues. Let's address your error first. Your counter variable |n| is bigger than the size of your |y| vector (...

plus de 3 ans ago | 0

| accepted

How to compare spec limit

Do it with a logical mask, V1 = 0.16; V1_LL = 0.36; V1_UL = 0.66; V1(V1<V1_LL) = V1_LL; V1(V1>V1_UL) = V1_UL;

plus de 3 ans ago | 0

how to save every iteration into workspace

You're overwriting alpha during every iteration. Replace |alpha| with |alpha(c)| and then move the save command outside the loop...

plus de 3 ans ago | 1

Entering a vector in a function with if else statement

I'm afraid your usage of |sorted_data(i-1)==NaN| would always return false. The right way to find if a value is nan is to use |i...

plus de 3 ans ago | 0

Make a function accept vector

This is called the element-wise operation. When you write |x^2|, MATLAB tries to find |x*x| but when you write |x.^2|, it calcul...

plus de 3 ans ago | 0

How do I fill a column and/or row vector with the j-th/i-th sums of a magic matrix' vectors?

If I understand you correctly, you want to make the sum of rows and columns, mag = rand(4); r = sum(mag,1); c = sum(mag,...

plus de 3 ans ago | 0