# Mara

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**Content Feed**

Random sampling and removing data

Hey Sooraj, it is not all clear to me whether you want to choose entire rows/columns of your matrix or completely random sets o...

10 months ago | 1

How to create axis with perfect square ticks

yticks((1:50).^2) if you just want to change the labels you can use yticklabels((1:50).^2)

10 months ago | 0

How to input signal to skip numbers and generate data?

A = [0 0 0 0 0 1 1 1 0 0 0 0 1 0 1 1 0 0 1 1 1 1 1 0 0 0 0]; n = 2; B = zeros (1,length(A)); count = 0; ...

10 months ago | 1

| accepted

If you follow this code, you will see a graph, but when you hit enter, line 45 keeps saying "'l' is an unrecognizable function or variable." But even though for I= 2:k is given, what is the problem?? ?

Your loop variable is a an upper case i, but in your loop you use a lower case l, which look identical in some fonts.

1 year ago | 0

Comparing strings of different lengths.

So is your question how to shorten your code? Maybe try this statement if strcmp(filename1, filename2) % Whatever you want...

1 year ago | 0

How to extract corresponding values of x-axis based y-axis values.

maybe use ismember: idx = ismember(y, [5,6,74,5,67]) xvalues = x(idx) P.S. sorry for the editing, I now read your problem c...

1 year ago | 0

Plotting multiple functions, while showing only parts of them

Hello, you can plot only to the maximal y-value by finding the index of it in your vector of y-values. When you plot x and y, y...

1 year ago | 0

Solved

Getting the indices from a matrice

Getting the indices from a matrice. Inspired by Problem 645. Getting the indices from a vector by the great Doug Hull. Given a...

1 year ago

Solved

Sum all integers from 1 to 2^n

Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

1 year ago

Solved

Magic is simple (for beginners)

Determine for a magic square of order n, the magic sum m. For example m=15 for a magic square of order 3.

1 year ago

Solved

Make a random, non-repeating vector.

This is a basic MATLAB operation. It is for instructional purposes. --- If you want to get a random permutation of integer...

1 year ago

Solved

Roll the Dice!

*Description* Return two random integers between 1 and 6, inclusive, to simulate rolling 2 dice. *Example* [x1,x2] =...

1 year ago

Solved

Number of 1s in a binary string

Find the number of 1s in the given binary string. Example. If the input string is '1100101', the output is 4. If the input stri...

1 year ago

Solved

Return the first and last character of a string

Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...

1 year ago

Solved

Create times-tables

At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

1 year ago

Solved

Determine whether a vector is monotonically increasing

Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

1 year ago

Solved

Check if number exists in vector

Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

1 year ago

Solved

Swap the first and last columns

Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

1 year ago

Solved

Swap the input arguments

Write a two-input, two-output function that swaps its two input arguments. For example: [q,r] = swap(5,10) returns q = ...

1 year ago

Solved

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]; ...

1 year ago

Solved

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]

1 year ago

Solved

Length of the hypotenuse

Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<http://upload....

1 year ago

Solved

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...

1 year ago

Solved

Generate a vector like 1,2,2,3,3,3,4,4,4,4

Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2...

1 year ago

Solved

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...

1 year ago

Solved

Finding Perfect Squares

Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

1 year ago

Solved

Maximum value in a matrix

Find the maximum value in the given matrix. For example, if A = [1 2 3; 4 7 8; 0 9 1]; then the answer is 9.

1 year ago

File-loop, for loop,importing excel data

%Read each CSV file, change the text data to numeric and work with it clear; clc; dirroot='C:\Documents\Excel\'; for L=1:2...

1 year ago | 0

| accepted