How to add values at blue dots in graphs?
You mean sum up the plotted blue 'square' marker data points? If so and you have only this plot as a data source, then you can ...

4 months ago | 0

I keep getting "Array indices must be positive integers or logical values."
clearvars;clc x = .993 : 0.01 : 1.283; for n = 1 :length(x) f(n) = 7*x(n)^3 - 2*x(n)^2 + 7*x(n) - 14; % Index has to be n...

4 months ago | 0

Change the frequency of an array
According to you exercise statement, this one works ok. f = input('Enter time frequency value: '); t0=0; dt = 1/f; tend = 30...

4 months ago | 0

How to remove rows with an empty cell from a big data set?
Here are a couple of good examples given by MATWORKS contributors: https://www.mathworks.com/matlabcentral/answers/42464-finding...

4 months ago | 0

Removing NaN from matrix
Use isnan() and assign the value you want or remove the points containing NaNs. See help how to employ it: mathworks.com/help/ma...

4 months ago | 0

You'd need to adjust your figure window (POsition, location and drawable area) sizes, respectively. Here is the help doc: https...

4 months ago | 0

how can I create a struct with row vectors
It is quite straightforward to create row vector components for a Structure array. E.g.: t=linspace(0,13, 131); GT.Pos = randi...

4 months ago | 0

how can I put xls data in to 2D lookup table toolbox in simulink
You'd need to employ: (1) [From Spreadsheet] block in order to read your data in MS Excel file. Note that you can specify in yo...

4 months ago | 0

| accepted

Why shortcut Ctrl+T cannot uncomment the code in InitFcn of simulink model, but start the simulation?
In SImulink, the shortcut Ctrl+T is reserved for the "run" command that executes models. That's why it does not work for uncomme...

5 months ago | 0

| accepted

erf(3) evaluation with recursive trapezoid rule
You need to set: b = 3;

5 months ago | 0

what type of signal is this?FIR filters
Here is the corrected code. Time domain vs. Frequency domain analysis of the signal t vs. xx: load firlab2 %% input = xx; ...

5 months ago | 0

| accepted

Problem with Newton Raphson Method for Two Variables
close all; clc,clear % Newton Raphson solution of two nonlinear algebraic equations xy = [0 1]; % initial guesses iter=0; ma...

5 months ago | 0

execute function if any evaluation is found to be false
if strcmp(TrueValMat{2,1}, BOX(1,:))==false... && strcmp(TrueValMat{2,2}, BOX(2,:))==false... ...

5 months ago | 1

Values of X where the function is between -0.5 and 0.5
syms x y fplot(legendreP(2:10, x), [-.5, .5]); axis([-0.5 0.5 -.5 .5])

5 months ago | 0

Sine Wave not recognize with find_system
You are right. Its name contains two words and because of that, supposedly it fails to locate it.

5 months ago | 1

Why do the ylabel renderings look different when Property Inspector says they are the same?
It looks like in the first one, "interpreter" option with "latex" has been employed. The second one is indeed is the default fon...

5 months ago | 0

Having trouble writing conditional statements?
Hi, Here are the "if" conditions: if azimuths(n)> 90 && azimuths(n)<180 %condition 4 ... end ... if a...

5 months ago | 1

i need help with my code, for error
Here are corrected part of your script: Ks=str2double(doubleKs{:}); Re=str2double(Re{:}); D = str2double(D{:}); % Data conv...

5 months ago | 0

Creating a piecewise sine function having different frequency components
There are two opts. One elementwise multiplication and the other is just product. % (1) Elementwise: S1S2_e = s1.*s2; % (2) J...

5 months ago | 0

Finding the index in two different arrays where values are closest
The answer is a quite straightforward that is to find the minimum of differences between the two lines. E.g.: DR = Rtrue1-Rtrue...

6 months ago | 0

Running anonymous function in MATLAB for sub-mesh.
Hi, Here is one of the viable solutuons to your exercise using the function option: clearvars % Number of circles to draw ...

6 months ago | 0

| accepted

How to do FFT on accelerometer excel data in Matlab?
Import your data Perfform fft(). Here is a nice documentation how to sue fft().

6 months ago | 0

Plotting y = kx
k=1:999; x =1:2024; F = k.* x(:); N = 25; contour(k, x, F, N), shg xlabel('k stifness'), ylael(' ...')

6 months ago | 1

Viewing IMD binary data
You can read (import) binary data into MATLAB using fread() (see doc here) and then you can plot it to visualize, and so forth.

6 months ago | 0

Why does the array only work once?
Hi, You have overlooked a few dot operations. Here is the corrected part of your code: %Finding angle Phi of force P ...

6 months ago | 1

Variable indexing for loop when vector is negative (Array indices must be positive integers or logical values)
Hi, Vectorization is the most efficient way, e.g.: a = 12*x.^5; Or if you need to do via a loop, then for ii=1:numel(x) ...

6 months ago | 0

How to check if a column data is equal to any of a group of values?
Altenrative (more efficient one) solution can be this one: S = sum(sum(ismember(A,B)))

6 months ago | 0

How to check if a column data is equal to any of a group of values?
You can use a loop for instance if you have many Bs, e.g.: for ii = 1:numel(B) Ind = A==B(ii); S(ii) = sum(Ind(:)); ...

6 months ago | 0