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how to use solve
syms b x a sol=solve ((2*cos(x) - b*(sin(x) + sin(a*x))) == 0,[x a b]) %chooses 'x' as the unknown and returns sol.x sol.a ...

3 years 前 | 0

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I can't run the code I wrote the way I want. Please help me
%Plot P-V diagram of a given substance using peng robinson equation of state %Substance properties are defined by the peng robi...

3 years 前 | 0

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Array elements are recalculated every iteration
This is one approach, where you can initialize a variable k and iterate along the time step nRows = ceil(endTime / ep.timestep...

3 years 前 | 0

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imshow displays blank figure
img = imread('image.png'); imshow(img); Change the syntax for *imread* as above.

3 years 前 | 0

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How to plot performance data based on process ID?
Data = [1680569427 83321 73.3 1680569427 83325 0.0 1680569427 83326 0.0 1680569427 83327 0.0 1680569427 83328 0.0 168056942...

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Problems with a function of matrix
Call the function from command window and not from inside the script file where you have the code % call the function from com...

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Index in position 1 is invalid. Array indices must be positive integers or logical values.
Change this line from s = s + v(x,y) * img(k,l); to s = s + v(x,y) * img(abs(k),abs(l)); in your code. The indices become ne...

3 years 前 | 0

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Problema al escribir en látex el nombre de un eje
ylabel('$\ddot{z_c}$','Interpreter','latex','fontsize',20)

3 years 前 | 1

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Normalizing an FFT Vector
Try with fftshift function , L = 100; x = linspace(0,L,L+1); psi = sqrt(2/L)*sin(pi*x/L); %particle in a box ground state% ...

3 years 前 | 1

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My error says "Unrecognized function or variable 'CP'." What can I add to the script so that I can define it?
None of the if statements for variables IoDR, IoDL are being executed. Can you check if the preceding if conditions for variable...

3 years 前 | 0

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Subscript indices must either be real positive integers or logicals always show up. what should i do?
%% Beam Properties L = 0.35; % Length of the beam (m) w = 0.02; % Width of the beam (m) t = 0.002; % thickness ...

3 years 前 | 0

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Calculate normal and shear stress of a beam where values of depth and width are under certain conditions
close all clear clc b = 1:200; d = 1:200; A = 2640; F = 300e3; d_max = 125; b_min = 20; NL = length(b); sigma_max = ...

3 years 前 | 0

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forcing the final column in a matrix to be zero
k = 10 a = ones(3,k) b = -1; if b < 1 a(:,end) = 0; end a

3 years 前 | 0

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Ideal Pressure Sensor, Static Head or Total Head?
The pressure sensor available in Simscape measures the total head or effective head. As you say there is no diameter to evalua...

3 years 前 | 0

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How do I make two variables the same number for conditions in a if=else statement?
Following the truth table output for xor and as suggested by @Walter Roberson , you would also need to change the if-else cond...

3 years 前 | 0

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How can I change a variable once at a specific point inside of a for loop?
You can change the sign of v_robot variable num_states = 2001; v_robot = 0.1; stdev_odometry = 0.1; delta_t = 0.1; b = zer...

3 years 前 | 0

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I am trying to create a function that shows the average grade of an entire class but my answer is in matrix form.
for student=1:Nstudent; ClassAverage(student)=mean(setOfData(:)); end ClassAverage = ClassAverage(1); Add the above line...

3 years 前 | 0

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Save .fig file as .eps file
plot(1:10) saveas(gcf,'Linechart','epsc')

3 years 前 | 0

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Subscript indices must either be real positive integers or logicals.
[XX,YY] = meshgrid(linspace((Lat1(minlat),(Lat1(maxlat),n),linspace((Lon1(minlon)),(Lon1(maxlon),n))

3 years 前 | 0

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How to make x-axis logarithmic for errorbar plot?
Use *semilogx* function

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Boxplot and Plot Overlay Problem
As you say, X, Y1 , Y2 are same size and since Y2 (c) is a vector with mean of each year, plot the graph using the unique va...

3 years 前 | 0

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Reynolds stress plot error
clear all; close all; clc; U_inf = 100; % free stream velocity in m/s L = 1; % plate length in m nu = 1.5e-5; % kinematic v...

3 years 前 | 0

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Why am I getting an error for mismatched number of elements?
Few changes that may be required are below. Test your code after those changes x = zeros(n,1); for i = 1:n .. S = ...

3 years 前 | 0

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How to pass on arguments in the form of two grids and return a matrix the elements of which involve conditional statements?
N = 4; DT = 1/N; t = linspace(DT/2, 1-DT/2, N)'; r = t + 0.3 * DT; [rr, tt] = ndgrid(r, t); a = f(rr, tt) function ...

3 years 前 | 0

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How to extend a vector continuously in a loop
ini_vector=[par.nN2_in par.nH2_in 0 0 0.01 0 0 0 0 0.999]; Initial = repmat(ini_vector,1,8)

3 years 前 | 0

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2D array to 1D with rows appending after another row
A = A.' A(:)

3 years 前 | 1

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I need help plotting using this while loop
xx = linspace(-5,9,85); w=0 while w<85 w=w+1; fxx(w) = ((xx(w)+1)^2)./(2+5*xx(w)); end plot(xx,fxx)

3 years 前 | 1

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My Code is giving indexing error, I am unable to fix it.
one way to verify the exact and approximate solutions is to vary boundary conditions suitably , % Clear all variables and clos...

3 years 前 | 0

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I am trying to do numerical integration to find the work out in a problem with less than 0.1% error.
From your comments in the code, as i understand if the temperature is < 300K , then efficiency is not possible to evaluate. I h...

3 years 前 | 0

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I'm running into an error at line 40, which is prompting me that I have an "invalid or deleted object". I'm wondering how to mend this.
P0 = [1,2,3]; P1 = [2,4,5]; P2 = [3,4,5]; P3 = [50,2,3]; P = [P0;P1;P2;P3]; t = linspace(0,1,100); tint = length(t); A = one...

3 years 前 | 0