Can you use replace to remove all characters that aren't letters from a string?
Try str = 'I; love123 you-+'; str_new = regexprep(str,'[^a-zA-Z\s]','');

4 meses ago | 0

Need help with an if loop
First, exp(x) has an expansion as follows: Now, how to define infinity? When , . So, we check if ...

4 meses ago | 0

Replace specific line in a text file
One of the way could be: fid = fopen('data.dat','r'); % Open File to read replaceline = 'act= 1,0,8,-2'; % Line to...

4 meses ago | 0

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compare between element of matrix in different size
To check if there is any common element between 2 vectors, you may consider using 'intersect()'. So, your if condition becomes: ...

4 meses ago | 0

problem in 3d figure plotting
one of the several ways could be: fill3(X,Y,Z,'b') I hope it helps !

4 meses ago | 0

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Plotting 3D Intersection
I am not sure how you actually want to plot these values. But one of the way I could think of plotting this data is by using B3:...

4 meses ago | 0

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how to over come vector mismatch error in plot
You can try : tp=2.2676*10^-3; Ts=22.6757*10^-6; n=0:Ts:100; fp=(1/tp); w=2*pi*fp; p=sin(w*n*Ts); p(find(p<0))=0; data =...

4 meses ago | 0

how do i print the 10 figures seprately ?
Try: clear;clc M = rand(1000,10); M = cos(2*pi*M); for c = 1:size(M,2) figure(c) hist(M(:,c)) title(num2str(...

4 meses ago | 0

How do you graph a function that refers to the function in its value?
MATLAB doesn't allow 0 as an index. Infact, index must be a natural number. y(0) % is an invalid index because 0 y(0.5) % is ...

4 meses ago | 0

How to turn scatterplot labels on and off using uicontrol
Try the following method (it might work for you but there are some limitations) : x = rand(1,100); y = rand(1,100); pointsize =...

4 meses ago | 0

Why is matlab giving me a a very small number when the answer should be EXACTLY zero?
It must be something to do with the limitation of matrix multiplication and the computing error comes with the this type of mult...

4 meses ago | 0

Create a new array on the basis of another array
Try: A = 100-V; A(A == max(A)) = 100;

4 meses ago | 0

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how to delete cell rows ?
One of the way to do: cell_sizes = cellfun(@size,QDSCD,'UniformOutput',false); cell_sizes = vertcat(cell_sizes{:}); ind = fi...

4 meses ago | 0

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wirte in excel sheet.
So, in order to change row as you change the q, you have to change the range dynamically. row_num = 1; % you can change that u...

5 meses ago | 0

Changing the For LOOP conditions
One of the way to do this is define the for loop conditions using predefined vectors. You can write vector to set how the for l...

5 meses ago | 0

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How to enter subscripts in matlab? for a loop
Simply shift your indeces by 1 i.e. x0 becomes x1, x1 becomes x2 and so on. N = 500; x = zeros(N+1,1); x0 = 1; x(0+1) = x0;...

5 meses ago | 0

Solved

Word Counting and Indexing
You are given a list of strings, each being a list of words divided by spaces. Break the strings into words, then return a maste...

5 meses ago

Solved

Knight's Tour Checker
Given a matrix a, determine whether or not a legal <http://en.wikipedia.org/wiki/Knight's_tour knight's tour> is present. The kn...

5 meses ago

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Volume of a box
Given a box with a length a, width b, and height c. Solve the volume of the box.

5 meses ago

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sum of first 'n' terms
Given n=10, find the sum of first 'n' terms Example: If n=10, then x=1,2,3,4,5,6,7,8,9,10. The sum of these n=10 terms is 55...

5 meses ago

Solved

05 - Vector Equations 3
Define the vector _dVec_: <<http://samle.dk/STTBDP/Assignment1_2d.png>> (Logarithmically spaced numbers between 1 and 10) ...

5 meses ago

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Implement simple rotation cypher
If given a letter from the set: [abc...xyz] and a shift, implement a shift cypher. Example: 'abc' with a shi...

5 meses ago

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07 - Common functions and indexing 3
Define _eMat_: <<http://samle.dk/STTBDP/Assignment1_3e.png>> Create the variable _eMat2_, which is equal to _eMat_ with th...

5 meses ago

Solved

Box!
Given a box, find the volume of the cube. With each side = a.

5 meses ago

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Check that number is whole number
Check that number is whole number Say x=15, then answer is 1. x=15.2 , then answer is 0. <http://en.wikipedia.org/wiki/Whole...

5 meses ago

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Reverse the vector
Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]

5 meses ago

Array indices must be positive integers or logical values.
y(0) = 1; % y(i) = k; i must be a natural number Not allowed in MATLAB. Instead write y(1) = 1;

5 meses ago | 0

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Why does my function keep returning zero?
Replace K1 = A1*exp(-(E1/R*T)); by K1 = A1*exp(-(E1/(R*T))); ans subsequently for K2 & K3 too.

5 meses ago | 0

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How to find acceleration from velocity and time data ?
Assuming you have exported velocity data from the csv file using xlsread or something and saved it in a variable, say, 'vel'. To...

5 meses ago | 1

How can I write data to excel without overwrite data that already in the excel ?
To write in the empty rows, you have to specify that to xlswrite. So, either you know the row number beforehand and use that 'xl...

5 meses ago | 1

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