# Cameron

### MathWorks

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95% confidence bounds from logistic curve (curve fitter) give different results to plotting via equation in script

The graph you showed indicates the 95% prediction bounds. The coefficients you provided as a, b, and c have an uncertainty with ...

6 months ago | 0

| accepted

How to align X and Y axis to middle of plot?

t = 0:5:360; x = cosd(t); y = sind(t); p = plot(x,y); p.Parent.XAxisLocation = "origin"; p.Parent.YAxisLocation ="origin";

1 year ago | 0

Find intersection point between two plotted lines

Looks like a stress-strain curve. Depending on the material, you could adjust the variable I named cutoff to 0.3*ymax or whateve...

1 year ago | 0

Loading .mat file problem

It looks like when the .mat file was saved, the variables weren't saved with their proper names. You could just keep it as it is...

1 year ago | 0

Plot different markers on the same graph based on “if-else” statement (third parameter) in AppDesigner

You should use indexing instead. t = readtable(Grid.xlsx,opts); app.UITable.Data = t; x = app.UITable.Data.Long; y = app.UIT...

1 year ago | 0

| accepted

How can I create a matrix of size nxn (user input) where all outside numbers are 1, incrementally decreasing by 1 each layer the matrix goes in?

n = 5; mymat = zeros(n); endVal = n; startVal = 1; for a = 1:ceil(n/2) indx = startVal:endVal; mymat(indx,indx) = ...

1 year ago | 0

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cla reset stops UIAxesButtonDown from working

cla(ax,'reset') Resets the ButtonDownFcn callback. I haven't tested this out, but can you just use this: myFun = ax.ButtonDown...

1 year ago | 0

| accepted

appdesigner setting uistyle back to default

removeStyle(app.UITable)

1 year ago | 0

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Why am I getting an error message on my code?

Try this instead estPiValues = zeros(numTrials,1);

1 year ago | 0

How can I draw points with 3 column data

You can adjust your plot as needed. data = webread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1332705/tec...

1 year ago | 0

Replace table elements in more than one row

You should look into how MATLAB does its indexing. You don't have to loop through the array to change a value. Just do it like t...

1 year ago | 0

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Random rows in matrix so no element from the first column occur twice in a row

A = randi(100,5,8); A [~,randrow] = sort(rand(size(A,1),1)); RandA = A(randrow,:)

1 year ago | 0

How i can convert a number in table to 6-digit decimal?

Do you mean 6 total digits or 6 digits after the decimal? For 6 total digits, you can do this: T = ([1:10;pi:pi:10*pi])'; MyA...

1 year ago | 0

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App Designer: How to add components that are not listed in the library

For these, you need to specify the axis. For example, if you have a UIAxes component, you would do this: %for a sphere sphere(...

1 year ago | 1

| accepted

Adding Matrices into main diagonal of Matrix

Why would your matrix be 10x10 instead of 30x30? This is how I would do it if you haven't already calculated your tmp values ahe...

1 year ago | 0

connecting sinus function with circle through animation

t=0:0.01:2*pi; x=3*cos(t); y=3*sin(t); tiledlayout(2,1) nexttile p1 = plot(t,y); axis square camroll(90) title('t vs. y'...

1 year ago | 0

| accepted

How do I add to a structure in a for loop?

files = dir('*.mat'); for i=1:length(files) S{i,1}=load(files(i).name,"-mat"); end

1 year ago | 0

How can I plot a second order differential equation with boundary condition using fourth order Runge-Kutta method?

Here is a list of built-in ODE solvers within MATLAB. Choose an ODE Solver - MATLAB & Simulink (mathworks.com)

1 year ago | 0

Help creating a graph

m0_1 = 600; g = 9.81; T = 6500; Isp2 = 290; C1 = Isp2*g; me1 = T/C1; mf1 = 350; TB1 = (m0_1-mf1)/me1; VB1...

1 year ago | 0

Average values with nan value

myArray = nan(8,1); %array of nan values indx = 1:2:7; %index to populate that array myArray(indx,1) = rand(length(indx),1) %...

1 year ago | 0

Why if statement with odd and even number does not work in function and just skipped condition?

I suspect what's happening is that you're passing a vector or array into your mod() function. If all elements of your variable "...

1 year ago | 0

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Error with plotting a massive text file data set.

data = readtable('Analysis1.txt'); plot(data.Var1,data.Var2)

1 year ago | 0

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gradient of bubble colors in a bubble chart

I'm not sure what you mean by "continuous trend from left to right". Can you post an image of what you're looking for? This was ...

1 year ago | 0

How to tilt the plot on the right to make it like the one on the left?

Use the "View" under the plot handle to update this. [X,Y,Z] = peaks(250); p = surf(X,Y,Z,'EdgeColor','none'); p.Parent.View ...

1 year ago | 0

All my Values not getting stored. Only my Last Value is getting stored

You need to save values of theta_average, so you can index it this way. You go through a while loop then save it when you need t...

1 year ago | 0

How can I change the variable (z) by any other variable such as (w) in the figures?

[X,Y] = meshgrid(1:0.1:10); Z = sin(X) + cos(Y); p = surf(X,Y,Z,'EdgeColor','none'); p = surf(X,Y,Z,'EdgeColor','none'); p.P...

1 year ago | 0

I was using if and Elseif statements. Everytime I input the third option the print for the second option appears.

The way you've written this, your program checks for this first (p1 == 's') so, seeing that you've selected "s" it will always...

1 year ago | 0

Extract upper triangle of matrix (using vector different from diagonal)

If you have the data in a form of X and Y data points, you can do something like this x = randi([220,800],100,1); %100 random x...

1 year ago | 0