Answered

Using sample code but returning a blank plot

You create a label and a title for a plot, but at no point do you feed it actual data to plot. Why would it do anything but prod...

Using sample code but returning a blank plot

You create a label and a title for a plot, but at no point do you feed it actual data to plot. Why would it do anything but prod...

1 year ago | 0

Answered

Create a Slanted Linspace Matrix

If you have the signal processing toolbox, the buffer command will do exactly what you want. If not, something like x = linsp...

Create a Slanted Linspace Matrix

If you have the signal processing toolbox, the buffer command will do exactly what you want. If not, something like x = linsp...

1 year ago | 0

Answered

log ticks on Y-axis

set(gca, 'YScale', 'log') Is this what you mean?

log ticks on Y-axis

set(gca, 'YScale', 'log') Is this what you mean?

1 year ago | 0

| accepted

Answered

error message how to solve !?

The error message is exactly what it says. You defined a function, which is not defined if one of your inputs is a function hand...

error message how to solve !?

The error message is exactly what it says. You defined a function, which is not defined if one of your inputs is a function hand...

1 year ago | 0

Answered

MATLAB isn't working to generate figures

Use hold on and hold off when generating figures. I've not used imshow before, but I'll guess that each time you generate a figu...

MATLAB isn't working to generate figures

Use hold on and hold off when generating figures. I've not used imshow before, but I'll guess that each time you generate a figu...

1 year ago | 0

Answered

How to add a NaN row at the beginning columns of a table?

for jj = 1:5 A(:,jj) = [NaN([jj 1]); B(1:end-jj)] A(T.id(1:end) ~= [NaN([jj 1]); T.id(1:end-jj)], jj) = NaN; end I h...

How to add a NaN row at the beginning columns of a table?

for jj = 1:5 A(:,jj) = [NaN([jj 1]); B(1:end-jj)] A(T.id(1:end) ~= [NaN([jj 1]); T.id(1:end-jj)], jj) = NaN; end I h...

1 year ago | 1

| accepted

Answered

signal to noise ratio (SNR)

According to the documentation, "r = snr(x,y) returns the signal-to-noise ratio (SNR) in decibels of a signal, x, by computing ...

signal to noise ratio (SNR)

According to the documentation, "r = snr(x,y) returns the signal-to-noise ratio (SNR) in decibels of a signal, x, by computing ...

1 year ago | 0

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Answered

How can I get archived documentation for a R2012b release?

As per the other answer, 2012b doesn't have easily accessed documentation. I have found, however, the 2012b release notes in thi...

How can I get archived documentation for a R2012b release?

As per the other answer, 2012b doesn't have easily accessed documentation. I have found, however, the 2012b release notes in thi...

1 year ago | 0

Answered

How to Integrate ?

Wolfram alpha is useful here to show you what can be done. If you click that link you'll see that I asked it to do which is ...

How to Integrate ?

Wolfram alpha is useful here to show you what can be done. If you click that link you'll see that I asked it to do which is ...

1 year ago | 0

Answered

Min and max value of many results

Good news! Matlab has built in min and max commands. So it's pretty straightforward to define them and store them in a vector: ...

Min and max value of many results

Good news! Matlab has built in min and max commands. So it's pretty straightforward to define them and store them in a vector: ...

1 year ago | 1

Question

Is it possible to include LaTeX expressions as text in my code?

I have a piece of code, where some of the variables can have their values chosen by me as and when I want. The values have very ...

1 year ago | 2 answers | 0

Answered

What is the difference between matlab download R2020a and R2020b?

Here are the release notes for 2020b. There likely isn't much to change for most people, when I updated from 2020a to 2020b I di...

What is the difference between matlab download R2020a and R2020b?

Here are the release notes for 2020b. There likely isn't much to change for most people, when I updated from 2020a to 2020b I di...

1 year ago | 0

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Answered

Index in position 1 is invalid. Array indices must be positive integers or logical values. (Slution of equation of motion with runge kutta 4)

t(1), q(1) and dqdt(1) are all zero. Matlab indexing starts at 1, so when you assign k_11 = y1_2nd(t(i),q(i),dqdt(i)) it trie...

Index in position 1 is invalid. Array indices must be positive integers or logical values. (Slution of equation of motion with runge kutta 4)

t(1), q(1) and dqdt(1) are all zero. Matlab indexing starts at 1, so when you assign k_11 = y1_2nd(t(i),q(i),dqdt(i)) it trie...

1 year ago | 0

Answered

I want the graph of the function only show the part where x>0

You want xlim. Give it one limit and it can calculate the other, or use xlim(0, length(y)).

I want the graph of the function only show the part where x>0

You want xlim. Give it one limit and it can calculate the other, or use xlim(0, length(y)).

1 year ago | 1

Answered

max and min row from an array

The built in min and max commands have the ability to return the index of the largest and smallest values in an array. The docum...

max and min row from an array

The built in min and max commands have the ability to return the index of the largest and smallest values in an array. The docum...

1 year ago | 0

Answered

How to change dot's place in fractional number

Multiply by 100? x1 = 0.25; x2 = x1 * 100; disp(x2) 25

How to change dot's place in fractional number

Multiply by 100? x1 = 0.25; x2 = x1 * 100; disp(x2) 25

1 year ago | 1

| accepted

Question

How do I find out what specifically is causing the error "Matrix is close to singular or badly scaled" in the sgolay function?

I'm using the sgolay function from the Signal Processing toolbox to calculate some derivatives. The function is inside a loop as...

1 year ago | 1 answer | 0

Answered

Plot a graph with linspace

You can't get that exact plot with linspace. I've managed to get it by using t = [0 1 1 2 3]; u = [1 1 0 0 0]; plot(t, u, 'k...

Plot a graph with linspace

You can't get that exact plot with linspace. I've managed to get it by using t = [0 1 1 2 3]; u = [1 1 0 0 0]; plot(t, u, 'k...

1 year ago | 0

| accepted

Answered

Finding points inbetween the values of my arrays.

If I understand your question, you want the interp1 command. You can choose how many target points to create, so make the lines ...

Finding points inbetween the values of my arrays.

If I understand your question, you want the interp1 command. You can choose how many target points to create, so make the lines ...

1 year ago | 0

| accepted

Answered

Curve Fitting for a function with 3 fitting parameters.

Bjorn's method will work. I'm just offering a second option, from the file exchange: https://uk.mathworks.com/matlabcentral/fil...

Curve Fitting for a function with 3 fitting parameters.

Bjorn's method will work. I'm just offering a second option, from the file exchange: https://uk.mathworks.com/matlabcentral/fil...

1 year ago | 0

Solved

Find all elements less than 0 or greater than 10 and replace them with NaN

Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

1 year ago

Answered

How to make a graph of an equation if part of it is an array?

You're right, the right side of line 10 has the same size as r (which itself has the same size as t), and you're trying to assig...

How to make a graph of an equation if part of it is an array?

You're right, the right side of line 10 has the same size as r (which itself has the same size as t), and you're trying to assig...

1 year ago | 1