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Programming in MATLAB applied to interdisciplinary engineering fields

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Why does this code fail?
fid = fopen('for1234.dat','w+'); fclose(fid) Since you are writing the data repeatedly to the same file, place the above f...

6日前 | 0

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plot using matlab(parabolic)
x = linspace(0.1,5,100); % may be parabolic y = 0.453 .* exp(-1.036 .* x) .* sinh((2.29.* x).^0.5); plot(x,y); Parabolic p...

6日前 | 0

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How to prepare extract monthly Data from a group of data?
A = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1272440/AO_1950_2022.xlsx'); A.Properties.Variable...

7日前 | 0

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'Index in position 1 is invalid. Array indices must be positive integers or logical values.', error in line 14 i.e., t1=D(ax(i),ay(i)).
clc clear all syms x y f=x*y^2;%input('enter the function:') p=diff(f,x); q=diff(f,y); [ax,ay]=solve([p,q],[x y]); ax=do...

8日前 | 0

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add constant value to row
A=readmatrix('DATA.xlsx'); % assuming DATA your filename A(:,end+1)=600; writematrix(A,'DATA.xlsx','Delimiter','tab') % writ...

9日前 | 0

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How to interpolate a set of data wher the X size is different for the Y size
Y=[1:14].';% 1 x 14 X=[1:2:5].'; % 1 x 3 Z=rand(14,3); % 14 x 3 [xq,yq]=meshgrid(1:0.0005:5,1:0.0005:14); % ...

9日前 | 0

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i want to plot the graph for while loop but the graph was blank
t(d)= t+h; %update T0 T0(d)= newT0;

10日前 | 0

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How to create a vector that repeats 5 values per increment in a for loop?
x = zeros(1,5); for ii=100:50:1000 x = [x ones(1,5)*ii]; end x(x==0) = []

11日前 | 0

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how to get no of samples?
format long % this will explain why there are 298 samples a=1:10; no_samples=(10-1)/(10-1) %have to get 10 samples g=1:no...

11日前 | 0

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Connecting two Matlab scripts under one loop
A=100*rand(10,1); %input('enter wind speed mean\n'); %first part a = numel(A(A<0)); b = numel(A(A>10)); S = a+b; N = n...

12日前 | 0

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Next value in alphabet
p = 'a' % e.g. user enters input letter nextLetter(p) % output of nextLetter function [next] = nextLetter(p) Alphabet = {'...

12日前 | 0

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Sound absorption coefficient of membrane backed with air cavity
clc clear all; f= (100:2:1600); omega= 2*pi*f; rho_s=0.265; T=76.53*(1+1j*0.005); D=0.1; a=0.05; % Fig 2 a c=343; rh...

13日前 | 0

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convert matrix steps from 1 to 0.1
If you are plotting 0 to 0.1 sec using 1000 data points, the you have to divide it by frequency, 10 kHz data./10000 I...

17日前 | 0

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Unrecognized function or variable 'zvar'.
xlabel('xvar') ylabel('yvar') xlabel('zvar') If zvar, yvar and xvar are strings or numeric values passed to function ...

17日前 | 0

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error using knop 'value'
app.Knob.Value = changingValue

17日前 | 0

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Got this ''Empty sym: 0-by-1''
syms x; q = 1:3; w = 2; for k = 1:length(q) eqn = (3*x) + q(k) + w == 0; sol = solve(eqn,x); S(k) = double(vpa(sol,2)) ...

18日前 | 0

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One condition is not being fulfilled, and suddenly when i wrote on command window, give me a infinite menu, and i can not close it
clc, clear, close while true a=menu({'This program allows the fitting of functions to experimental points.', ... ...

18日前 | 1

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how to solve one variable in non linear equation?
clc clear all T=12; u1=400;u2=8;a=30;b=5;a2=100;A=500;c2=10;c3=12;c4=8;D0=115; b2=0.2; a=-1.1;d=11.2;m=-0.5;k1=1.5;k0=1.1;k2=...

19日前 | 0

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How to create a loop?
clear all clc format longG; format compact; txt = input ('Choose a Production Period: 1) Annual 2) Monthly 3) Weekly 4) Dail...

19日前 | 0

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generate and save numerous datas in one code then load them in another code
% in A.m file [p,q] = B % call the function wbich returns those outputs variables (values) n = p + q % add them directly as...

21日前 | 0

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Precision of rounding numbers
D = 1/(0.1*0.00001) fprintf('%.2d',D) % try using %d format specifier As you are using %f it is meant for floatpoint num...

21日前 | 0

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Open an "array" of filenames
Its possible to open multiple files as you intend. Use the sprintf function to open individual filenames identified using an in...

21日前 | 0

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Char not working properly ?
To display text on figure window, you should rather use uilabel function in place of uitextarea which produces same output as de...

22日前 | 0

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During matching process I want distinct Number but I am getting same number for few data set. Is there any command to get distinctive number always.
Use *unique* function.

22日前 | 0

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Save each output in one file
writematrix(peaksnr, 'psnrO.xls','Sheet', i)

22日前 | 0

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Where is the mistake? Taylor Series in matlab?
syms T alpha = 0.056; beta = 0.0000186; R = 2000; f = R*(alpha+0.0078*(T-25)+beta*(T-25).^2); f = subs(f,T,80); tayl...

24日前 | 0

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My simulation doesn't take into account the different height of the Faraday waves?
% Define physical parameters g = 9.81; % acceleration due to gravity d = 0.1; % fluid depth omega = 0.1; % forcing frequency ...

24日前 | 0

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Loop through multiple columns in table using if condition
X.A = [randi([0 10],1,7) NaN] X.B = repmat(NaN,1,8); for i = 1:length(X.A) if (isnan(X.A(i)) & isnan(X.B(i))) ...

25日前 | 0

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Iteration of writing videos
Place the below line close(cutvideo) Outside of the outer _for loop_ with index _k_.

25日前 | 0

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I keep getting this for my function and I don't know how to fix it -- Undefined function 'symsum' for input arguments of type 'double'.
format long N = [5 10 50]; Phi = prob2_6(N) % call function by passing vector of values with range N function phi = prob2_...

26日前 | 0

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