Finding 4 closest values to a value in an array
use mink [~,idx] = mink(abs(data-find_point),5); data(idx)

2 years ago | 1

| accepted

How to get Y-values from X-values?
if you just want the Y value for the nearest point: [~,idx] = min(abs(X-certainX)); certainY = Y(idx); I don't see quite th...

2 years ago | 0

| accepted

How to increase fontsize of matlab IDE?
there is a workaround here that probably still works: https://www.mathworks.com/matlabcentral/answers/233543-how-to-change-the-...

2 years ago | 0

Can you plot polarplots so that theta zero location is at any arbitrary angle or are top left bottom right the only options?
something like this: top_angle = 24; % get current labels tt = thetaticks; % rotate angles so top_angle takes place of 90 t...

2 years ago | 0

How to plot many curves on a x-y-x axis system
sounds like plot3 is what you want, though I'll warn you that getting readable figures out is more an art than a science

2 years ago | 0

How do I display the first 20 numbers of the Fibonacci sequence?
you need to define the first two numbers manually, then start on the third f(1) = 0; f(2) = 1; for a=3:20 ... Also, it's un...

2 years ago | 0

Convert a non uniform cell array of cell arrays to matrix
(see comments on question for details not related to the title question) A1 = cell2mat(runData_struc{1}); A2 = cell2mat(runDat...

2 years ago | 0

| accepted

Preallocating a variable that changes size every for loop iterations.
It's just a code suggestion, you can safely ignore it.

2 years ago | 0

Saying Else is invalid syntax
you have two else's for the same if. Select it all and hit CTRL-i to smart indent to see: function [d1,d2,d] = dotangle(u,v) m...

2 years ago | 0

Histogram with many data
Use tall arrays: https://www.mathworks.com/help/matlab/import_export/tall-arrays.html

2 years ago | 0

Data Cleansing in Tables
test_rejoined = outerjoin(test(:,[1 3 4]),test(:,[2 5]),'LeftKeys','id2','RightKeys','id','MergeKeys',true); separate table int...

2 years ago | 0

| accepted

Fitting and smoothing the noisy curve
check out smoothdata and this guide

2 years ago | 0

| accepted

Row unity in matrix
P_norm = P./sum(P,2);

2 years ago | 0

| accepted

Hi, I am asking the user for input and the input should be either "AA" "Aa" or "aa". How can I validate the input using a while loop? I don't think my code works.Thanks!
You're requiring that it be all valid entries simultaneously parentOneA = input("Enter Parent 1's A Trait: ") % Error checking...

2 years ago | 0

Im putting in my equations wrong and i need help
should that be T1? also, replace 25 hardcoding with v0 (and 30 with T1) d1= (v0.*cosd(T2)/g).*((v0.*sind(T2))+sqrt((v0.*sind(T2...

2 years ago | 0

sub2ind gives error: Error using sub2ind (line 73) Out of range subscript.
sim_i_r was valid indices (integers greater than zero), but you changed it to invalid ones (zeros, decimals, negatives). Matlab ...

2 years ago | 0

| accepted

Index daily values in TT over many years to determine mean
This will create a table with the average for each day of the year (1-366). 'dayofmonth' might be preferable for just July data ...

2 years ago | 0

| accepted

While starting Matlab icon on desktop, it is throwing error matlab.exe is moved or deleted.
delete the Matlab icon on your desktop type "Matlab" into your Start Menu search The top result should be the Matlab app/progr...

2 years ago | 0

Plot bar chart with log scale on y axis with different base
% set whatever base you want (incl. decimals) mybase = 2; % get current limits yl = ylim(); % convert to log-mybase scale y...

2 years ago | 0

What frustrates you about MATLAB? #2
Livescript complaints First off, they've come a long way since I tried them on release. But, there are still some issues: Drop...

2 years ago | 1

How to store a matrix, A, in variable X, where X is also carrying a counter "i"
Simple way: add a third dimension, "pages": X(:,:,i) = A; But, if you only need the last iteration, it's better to store jus...

2 years ago | 0

Permutations of array retaining sub-array groups together
I believe the best way to describe your arrays-with-subgroups is using cell arrays: my_array = {1 [2 3] 4} my_array = {...

2 years ago | 1

Does MATLAB have functionality similar to Mathematica's Import function to import html tables?
check out htmlTableToCell on the file exchange, followed by cell2table

2 years ago | 0

| accepted

Random shuffle of image pixels/ Image scrambling
You can use randperm to shuffle the indices randomly, then sort to get the indices for reversing it: % load in an image include...

2 years ago | 0

Nested loops and function output into a matrix inconsistency
It seems like your 'w' columns are supposed to correspond to q-r pairs. Currently, this isn't happening, so each q-r pair will f...

2 years ago | 0

| accepted

How to write special characters into an Excel cell?
If you can find the numeric code for the symbols, it should print with that. For example, this prints π | ϕ | μmol/kg T1.Proper...

2 years ago | 0

| accepted

Adding a unit row to a table
% create example table T = array2table(magic(3),"VariableNames",["a";"b";"c"]); % define units T.Properties.VariableUnits = [...

2 years ago | 0

| accepted

Changing empty array for peak width to zero
% preallocate default values pks1 = nan(25,1); loc1 = nan(25,1); width1 = zeros(25,1); prom1 = nan(25,1); for i=1:25 [...

2 years ago | 0