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Rotate 2D function
To rotate by pi/2 radians about the z axis, you can use: syms x figure(1); Function = 45/4 - (27*x)/2; %My function fplot(x,...

6年弱前 | 1

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Problems in using "dwtest"
The error is saying the first argument to qr() must be double or single. That first argument is X, and if you comb through dwtes...

6年弱前 | 0

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i am facing error to know index of element
find(A==5,1) will give you just the first index in A which equals 5.

6年弱前 | 0

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When using yyaxis is there a way to plot the right yaxis data behind the left yaxis data?
Normally uistack would work, but see here: https://www.mathworks.com/matlabcentral/answers/335430-plot-order-with-two-y-axes Y...

6年弱前 | 1

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Issue with plotting. I put it in a vector but it returns a scalar once it goes through the calculation
Add a dot before the division symbol in the third line for element-wise division: x = 10; N = [1:60] sumN = x.^N./factorial(...

6年弱前 | 1

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How can I replace two for loops with matrix operations to calculate quardatic form?
Considering that c(i,j) is the dot product of the difference between the ith and jth columns of t with itself, this should work:...

6年弱前 | 0

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Title appearing on wrong figure
For both imshow() and title(), you can specify a target axes: f = figure; ax = axes(f); imshow(reshape(x, shape), 'Parent', a...

6年弱前 | 0

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Matlab Help for 3D Graphing
The plot: And the updated code: x = 0:49; y = 0:1; z = [197 203 161 124 147 109 134 134 213 172 194 162 90 136 142 181 162...

6年弱前 | 0

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Balanced number
Given a positive integer find whether it is a balanced number. For a balanced number the sum of first half of digits is equal to...

6年弱前

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Getting weird results when calculating an integral using rectangle method
vec1 = pi/180*(0.005:0.01:14.995); Here, vec1 is in radians, but the values are not spaced 0.01 radians apart: >> vec1(2)-vec1...

6年弱前 | 0

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Row index exceeds table dimensions.
This line: trans(k,:)=[]; shortens your table trans, but k will keep increasing until it reaches the original height of trans,...

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How to find row with certain value and merge them?
I was able to think of two methods. I can't guarantee either method is the most elegant solution, and I only tested each method ...

6年弱前 | 0

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Replace NaNs with the number that appears to its left in the row.
Replace NaNs with the number that appears to its left in the row. If there are more than one consecutive NaNs, they should all ...

6年弱前

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Interpolator
You have a two vectors, a and b. They are monotonic and the same length. Given a value, va, where va is between a(1) and a(end...

6年弱前

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Read a column of numbers and interpolate missing data
Given an input cell array of strings s, pick out the second column and turn it into a row vector of data. Missing data will be i...

6年弱前

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Alphabetize by last name
Given a list of names in a cell array, sort the list by the last name. So if list = {'Barney Google','Snuffy Smith','Dagwood ...

6年弱前

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Target sorting
Sort the given list of numbers |a| according to how far away each element is from the target value |t|. The result should return...

6年弱前

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Find the peak 3n+1 sequence value
A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

6年弱前

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Find state names that start with the letter N
Given a list of US states, remove all the states that start with the letter N. If s1 = 'Alabama Montana Nebraska Vermont Ne...

6年弱前

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Kaprekar Steps
6174 is the <http://en.wikipedia.org/wiki/6174_%28number%29 Kaprekar constant>. All natural numbers less than 10,000 (except som...

6年弱前

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Find common elements in matrix rows
Given a matrix, find all elements that exist in every row. For example, given A = 1 2 3 5 9 2 5 9 3 2 5 9 ...

6年弱前

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Find the two-word state names
Given a list of states, remove all the states that have two-word names. If s1 = 'Alabama Montana North Carolina Vermont N...

6年弱前

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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...

6年弱前

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The Goldbach Conjecture, Part 2
The <http://en.wikipedia.org/wiki/Goldbach's_conjecture Goldbach conjecture> asserts that every even integer greater than 2 can ...

6年弱前

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Encode Roman Numerals
Create a function taking a non-negative integer as its parameter and returning a string containing the Roman Numeral representat...

6年弱前

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Elapsed Time
Given two date strings d1 and d2 of the form yyyy/mm/dd HH:MM:SS (assume hours HH is in 24 hour mode), determine how much time, ...

6年弱前

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Find state names that end with the letter A
Given a list of US states, remove all the states that end with the letter A. Example: Input s1 = 'Alabama Montana Nebras...

6年弱前

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The Goldbach Conjecture
The <http://en.wikipedia.org/wiki/Goldbach's_conjecture Goldbach conjecture> asserts that every even integer greater than 2 can ...

6年弱前

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Pattern matching
Given a matrix, m-by-n, find all the rows that have the same "increase, decrease, or stay same" pattern going across the columns...

6年弱前

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convert cell of 'True' and 'False' values to a numeric array of 1s and 0s
You can try tad = strcmp(tad,'True')

6年弱前 | 2