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Programming in MATLAB applied to interdisciplinary engineering fields

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How to count number of terms in a symbolic expression?
syms x y z='x*y+cos(x*y)*x+x*sin(x)+sin(x)*cos(x)-x-y+2' C = strsplit(z,{'+','-'}) length(C) C{3} % 3rd term

4 hours ago | 0

Answered
What command do i need after de hold off fuction to print the labels in my plot?
print('-image','-dpng', 'windclimate_allyears.png') Try using the OpenGL graphics rendering format as above. The version of Mat...

15 hours ago | 0

Answered
How do I optimize graph size?
May be the change in coefficient for cosine function plotted in black color as shown below z = -72:0.2:72; hold on Tb = 543.4...

13 days ago | 1

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Answered
I am trying to plot a series, with multiple variables.
clc; % Define parameters T_sub_1 = 100; H = 2; L=1; syms n % Create meshgrid x=linspace(0,2,20); y=linspace(0,4,20);...

13 days ago | 0

Answered
Matlab symbolic : calculate expression with vector of symbolic variables
Use the element wise operator for / and ^ ... i.e. ./ and .^ as below clear syms l_min l_max fsky Np var1D var2D varO1...

14 days ago | 0

Answered
while loop running forever during attempt at Newton Rhapson method
d=0.007; dI=1.219; Rfi=1.76*(10^(-4)); Rf0=Rfi; hs=356; ht=hs; kw=60; dTm=29.6; Q=801368; Aex=64.15; a=((1/ht)+Rfi)/dI...

15 days ago | 0

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Answered
Need to solve Fourier Series script
if you have the entire code in one script file, then you can put all the functions after the plot function call as below otherwi...

15 days ago | 0

Answered
Correlation Coefficient in Legend
Use the sprintf command in legend function just like the text, and include a higher precision specifier for decimals e.g,. 5...

25 days ago | 0

Answered
can't plot
syms p1 ap2 ap3 ap4 th1 = 0; ap1 = 0; a1 = 0; b1 = 0.5; c1 = 0; R1z = [ cos(p1), -sin(p1),0, 0; sin(p1), cos(p1), 0, ...

25 days ago | 0

Answered
why is this code not running?
plot(TimeValue, Pdispatch(:, 1), 'Color','r', 'LineWidth', 2);

4 months ago | 0

Answered
Error: variable might be used before it is defined.
Change this line yy2 = Pr*(y(4)*y(2)-y(1)*y(5)-Df*yy3-Nb*y(5)*y(7)-Nt*y(5)^2) to yy2 = Pr*(y(4)*y(2)-y(1)*y(5)-Df*y(3)-Nb*y...

4 months ago | 0

Answered
Why am I getting the error "Array indices must be positive integers or logical values" in MATPOWER?
The problem is with nested matrices bs or n2i matrices. % brs = ( mpc.branch(:, BR_STATUS) & ... %% branch status % ...

4 months ago | 0

Answered
Conversion of symbolic expression to double without obtaining complex numbers
oneway, is to use a conditional statement for negative input values through abs function. But if you want to avoid complex va...

4 months ago | 0

Answered
argument suggestion with shared argument validator
function s = fun3(a) arguments a {mustBeMember(a,@dummyClass)} = "a" end ...

4 months ago | 0

Answered
Matlab App designer export figure
% File exchange exportfig(app.UIAxes,"test") % Standard matlab function savefig(app.UIAxes,"test.fig") % exportgraphics ...

4 months ago | 0

Answered
f(x)=3x^3-5x^2+3x-7=0
x(1) = 0; % assuming x(1) = 0 kk(1)=1; for k=1:100; fx=3*x(k)^3-5*x(k)^2+3*x(k)-7; % use multplication operator for pro...

4 months ago | 0

Answered
How can I fix this error?
shipweightpmf( [2 2.5 6] )' function y = shipweightpmf(x) s = (1:8)'; p = [0.15*ones(4,1); 0.1*ones(4,1)]; y = finitepmf(s,...

4 months ago | 1

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Answered
How to disable a block in library ?
You can either use *switch-case* statements for controlling the execution of service meter blocks or a *function call* to trigge...

4 months ago | 0

Answered
Add values from vector to plot title
title({['Unit Step Response of G(s) = \omega_{n}/(s^2 + 2\zeta\omega_{n}s + \omega_{n}^2)'], ... ['\zeta = ', num2str(...

4 months ago | 0

Answered
how to create stack with multiple images?
b=cell(7,9); I_max=cell(7,9); I_stack_store=cell(9,1); for t=1:9 for i=1:7 I= rand(50,10,3); b{...

4 months ago | 0

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Answered
How to plot simulation results in a GUI while the simulation is running?
Use drawnow command for updating the simulation results Read more about the command here https://in.mathworks.com/help/matl...

4 months ago | 0

Answered
save images in array in two for loops
b=cell(7,9); for t=1:9 for i=1:7 I= rand(34,78,2); % image data b{i,t}=I; end end b = b(:)

4 months ago | 0

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Answered
Getting the Wrong Output While Using Image Batch Processor
possibly you are calliing the function porosity_function inside a loop, which repeats 12 times and storing the output for all im...

4 months ago | 0

Answered
a function just valid over a certain range
x = 0:0.1:10 ; for k = 1:length(x) if x(k) >= 2 & x(k)<= 8 y(k) = x(k).^2+3.*x(k)+1 ; else y(k...

4 months ago | 0

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Answered
error in multiplying symbolic variable in a matrix
clear clc syms z L [1 11] z , L x=[0 300 1000 1500 1700 2000 3000 3300 4000 4500 5000]; y=[32.0 122.4 296.4 405.7 447.6 60...

4 months ago | 0

Answered
How to write the output of matlab iteration results of many equations in excel in row by row specifying the starting row?
k = 1; for Xref1=0:0.1:1 % Loop through the range of inputs Xref1; Hi=Xref1*10; Lo=Xref1*5; out_put(k,:...

4 months ago | 0

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Answered
Stateflow onramp unreachable state task 4 error
Did you give the conditions & condition actions also from previous tasks ? It looks like you've added only transition

4 months ago | 0

Answered
plot w=exp(-x/0.3042) (when 0<w<1)
w=@(x) exp(-x/0.3042) fplot(w,[0 1])

4 months ago | 0

Answered
simple function plot in MATLAB
Hi @Sanjida Use element wise division for evaluatiing the vector Y, It seems you have used incorrect operator ' \ ' this is...

4 months ago | 0

Answered
Properties of exponentials - symbolic algebra
Hi @Luca Lazzizzera You can of course use simplify as @Mischa Kim mentioned. However, if you want to obtain the simplified ex...

4 months ago | 0

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