# Nora Khaled

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**Content Feed**

how to write 2 summations

p=3; m=4; n=randi(5,p,m) %for loop: ans1=0; for i=1:1:p for j=1:1:m ans1=ans1+n(i,j); end end ans1...

2 years ago | 0

| accepted

Plot data according to different ID

This might work t = readtable('samle_data.xlsx'); % devide table into groups using ID G = findgroups(t(:,1)); dataB...

2 years ago | 1

| accepted

Shifting columns in matrix Matlab

clear all; clc H=[0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 1 1 1 0 0 1 0 0 0 0 1 0 0 1 1 0 0 1 0 0 1 1 0 0...

2 years ago | 0

How can i plot two columns in different colors in MATLAB

check out this code I wrote... is it what you want ? %data colomns x={2,4,8,9,3}; a={'3:17:00 AM';'5:06:30 AM' ;'7:18:00 AM'...

2 years ago | 0

| accepted

How to write matlab code that result odd component zero?

%vector of random integers v1=randi(10,10,1); %find odd number and replace by zero v2=v1; v2(mod(v2,2)~=0)=0; [v1,v2]

2 years ago | 0

Index exceeds the number of array elements (1).

can't run your code because it need to open file. But check the sizes x1_rec, y1_rec, x2_rec, and y2_rec. it seems that you ...

2 years ago | 0

Fill a vector with two vectors

v1 = [3 8 6 7]; v2 = [1 5 9 4]; r=[]; for i=2:1:length(v1) r=[r v1(i) v2(i)]; end r

2 years ago | 0

Reading Multiple sheets to different data sets

this may help https://www.mathworks.com/matlabcentral/answers/300842-importing-data-from-excel-across-multiple-sheets-and-file...

2 years ago | 0

Thickness of height profile in Matlab

Try this % to plot vertical line xAxis=1.25 ymin=B % min point ymax=A %max point line([xAxis xAxis], [ymin ymax]); % ad...

2 years ago | 0

| accepted

A bouncing circle on a 2d plot, how to plot a cos2 function

In your code you have b= r+hmax/2*(cosd(t).^2)+hmax/2; which I think is the trajectory of the ball. and if you plot it you ge...

2 years ago | 0

how to fprintf and disp on the same line

disp always starts new line afterward. you should only use fprintf and '\n' if you want to end the line fprintf('The number ...

2 years ago | 0

| accepted

How do I fix this error to output the correct data? I get an error when I use disp.

if the error in "disp", use fprintf(formatSpec,A1,...,An) or maybe this works X=['You caught ' , wholeFishWeight , ' kg of f...

2 years ago | 0

How to enter intermittent entries in a vector

a=1:1:6; v=[]; for i=1:2:length(a) v=[v a(i) a(i+1) 0 0] ; end v

2 years ago | 0

| accepted

Vector access and manipulation

do you only discard the function output for a vector of all zeros? or for zero elements. why not use if-else f =@(x) x.^2; Ve...

2 years ago | 0

Why I get ans = logical 1

in your last case you use else then put a condition. you should either use "elseif" or no condition.

2 years ago | 2

| accepted

How to display graphically

not sure this is what you had in mind ... %Environment envSize=4; figure; x=-envSize:0.1:envSize; y=.5*sin(x); plot(y,x,'...

2 years ago | 1

| accepted

why reading .xls file using xlsread returns empty variables?

The problem is the data is not in the first sheet of the .xls file. I needed to sort the xls sheets before using [ndata, text...

2 years ago | 0

| accepted

How can I modify negative values from two datasets based on a positive given one?

maybe this works ? if i == 1 y=y+(x-y); Coeff(i) = abs(max(y)/max(x)); else Coeff(i) = abs(max(...

2 years ago | 0

Question

why reading .xls file using xlsread returns empty variables?

Hello I have some data in a .xls file. the file content is four colunms. the first row is a header then all others are numbers....

2 years ago | 1 answer | 0

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answerHow do i read audio and include it in my function?

check out this function [y,Fs] = audioread(filename) it reads data from the file named filename, and returns sampled data, y,...

2 years ago | 0

How do I add a text string after my contour labels?

If I understood your problem correctly... I think the answer in this question will help you https://www.mathworks.com/matlabcen...

2 years ago | 0

compare and sort element in two arrays in matlab?

Try this code... I hope I understood the problem correctly clc; clear all; %function c = @(x) x.^2; %data a=[3 1 2];...

2 years ago | 0

How can I get a smoothing line like Excel?

I tried the answer to this question https://www.mathworks.com/matlabcentral/answers/411231-connecting-data-points-in-a-smooth-...

2 years ago | 0

| accepted

How do I create a multiline plot using values from a table?

If I understand the problem correctly this might help % creating tabel exampel col1 = {'A';'B';'C';'D';'E'}; col2 = [1:1:5]...

2 years ago | 0

Question

problem in converting a matrix of integers to vector of integers using str2num and num2str

Hello, I have a matrix x of this form (these are example values) 1 0 0 1 0 0 1 0 0 0 0 0 0 0 1 1 0 0 1 ...

2 years ago | 1 answer | 0

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answerQuestion

How can I read csv file data correctly? I tried multiple ways

Hi I have a csv file and I am trying to import it to matlab. an example for the file content is the following (this is one row...

2 years ago | 2 answers | 0

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answersQuestion

changing the activation function to ReLU? nntool command.

Hi ! I want to build a neural network such that it consist of 3 layers ( 2 ReLU layers and an output layer) with 10 neurons i...

3 years ago | 0 answers | 0

### 0

answersQuestion

Question about estimating an LTI system matrices using system identification toolbox.

Hi ! I would like to ask about the the system idintification toolbox. In my problem I used linear parameter varying model...

3 years ago | 0 answers | 0

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answershow to find value of x for a known value of y(x), using fplot?

The only way I was able to do this is to change z(x). insted of having all the lines in one plot. I created a loop such that a...

3 years ago | 0

| accepted

Question

How to scatter/plot a vector vs a cell array ?

Hello, I have a vector w such that w=0:0.1:5 I use this vector to get values saved in a cell array. such that for each el...

3 years ago | 1 answer | 0