Answered

Rearranging tables based on elements

For tables, an effective way to "transpose" (switch rows with columns, including variable names) is using the rows2vars function...

Rearranging tables based on elements

For tables, an effective way to "transpose" (switch rows with columns, including variable names) is using the rows2vars function...

1 year ago | 0

Answered

Finding student t critical value...

Here's demo code using tinv to produce the t-critical values for a two-sided test with independent samples (i.e., between-subjec...

Finding student t critical value...

Here's demo code using tinv to produce the t-critical values for a two-sided test with independent samples (i.e., between-subjec...

1 year ago | 0

Answered

How to draw a pulse train

It seems you want to replace the negative portion of the pulse with zeros. Like this, perhaps: fy=100; wy=2*pi*fy; duy=0.02;...

How to draw a pulse train

It seems you want to replace the negative portion of the pulse with zeros. Like this, perhaps: fy=100; wy=2*pi*fy; duy=0.02;...

1 year ago | 0

Answered

How to generate Pattern in MATLAB

Here's code to generate the patterns in the image posted: f = figure('color', 'w', 'Units','normalized','Position',[.25 .3 .4 ....

How to generate Pattern in MATLAB

Here's code to generate the patterns in the image posted: f = figure('color', 'w', 'Units','normalized','Position',[.25 .3 .4 ....

1 year ago | 0

Answered

How do I make the movmean calculate the moving average at the start- and endpoints of an array but in conjunction to each other?

This seems to do the trick: A = [0 2 4 1 3 5 7]; M = movmean(A,[2 1]); M2 = movmean([A A A],[2 1]); n = numel(A); M2 = M2...

How do I make the movmean calculate the moving average at the start- and endpoints of an array but in conjunction to each other?

This seems to do the trick: A = [0 2 4 1 3 5 7]; M = movmean(A,[2 1]); M2 = movmean([A A A],[2 1]); n = numel(A); M2 = M2...

1 year ago | 0

| accepted

Answered

How to rank data and set corresponsing values

Assuming the rankings are just used to explain your final goal, the following seems to work: M1 = [0.004130861 0.001492476 -0...

How to rank data and set corresponsing values

Assuming the rankings are just used to explain your final goal, the following seems to work: M1 = [0.004130861 0.001492476 -0...

1 year ago | 0

Answered

How can I save the output figure into an image file?

A easy way is to use exportgraphics, introduced in R2020a: f = figure; imshow(...); exportgraphics(f, 'filename.jpg'); % or ....

How can I save the output figure into an image file?

A easy way is to use exportgraphics, introduced in R2020a: f = figure; imshow(...); exportgraphics(f, 'filename.jpg'); % or ....

1 year ago | 0

Answered

Generate acoustic signal with difference rise time and fall time

Here's a simple approach that provides separate control for the rise or attack time (n1), the sustain time (n2), and the decay o...

Generate acoustic signal with difference rise time and fall time

Here's a simple approach that provides separate control for the rise or attack time (n1), the sustain time (n2), and the decay o...

1 year ago | 0

| accepted

Answered

Store identical rows in specified column

This seems to answer your question. There are 41 uniques IDs in the second column of your data set. The code below extracts th...

Store identical rows in specified column

This seems to answer your question. There are 41 uniques IDs in the second column of your data set. The code below extracts th...

1 year ago | 0

| accepted

Answered

Save marked point on plot

OK, this seems to to work. The x-y coordinates of the marked points are output to the command window (along with the figure num...

Save marked point on plot

OK, this seems to to work. The x-y coordinates of the marked points are output to the command window (along with the figure num...

1 year ago | 0

| accepted

Answered

Save marked point on plot

Since you haven't provided any data or code, this is a rough answer only: [pks, locn] = findpeaks(-y, 'MinPeakProminence', 0.1)...

Save marked point on plot

Since you haven't provided any data or code, this is a rough answer only: [pks, locn] = findpeaks(-y, 'MinPeakProminence', 0.1)...

1 year ago | 0

Answered

How to convert an excel file (.csv) to a .wav format/any other audio format file?

I was able to play your audio data and save it as a .wav file. It's some sort of noise along with a dripping sound. But, I had...

How to convert an excel file (.csv) to a .wav format/any other audio format file?

I was able to play your audio data and save it as a .wav file. It's some sort of noise along with a dripping sound. But, I had...

1 year ago | 1

| accepted

Answered

how to easily and quickly change the variable names (headers) of multiple tables

For each table, it can be done like this: (To illustrate, this example is just for 5 columns) T = array2table(rand(3,5)); vn =...

how to easily and quickly change the variable names (headers) of multiple tables

For each table, it can be done like this: (To illustrate, this example is just for 5 columns) T = array2table(rand(3,5)); vn =...

1 year ago | 0

Answered

How to assign Nans to specific column, not entire row

Your first attempt was almost correct. Here's the fix: ZB1array = rand(5,5) % test data idx = ZB1array(:,4) < 0.95; ZB1arra...

How to assign Nans to specific column, not entire row

Your first attempt was almost correct. Here's the fix: ZB1array = rand(5,5) % test data idx = ZB1array(:,4) < 0.95; ZB1arra...

1 year ago | 0

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Answered

How to find the sum of characters in a cell array?

bowling= {{7,2,8,'/',6,2,'X',9,'/',9,0,'X','X',8,1,7,'/',9}, {'X',9, '/','X',8,'/','X','X',7,2,'X',8,'/',9,0}}; num_spares = su...

How to find the sum of characters in a cell array?

bowling= {{7,2,8,'/',6,2,'X',9,'/',9,0,'X','X',8,1,7,'/',9}, {'X',9, '/','X',8,'/','X','X',7,2,'X',8,'/',9,0}}; num_spares = su...

1 year ago | 2

| accepted

Answered

Plotting periodic sawtooth wave with 25%, 50% and 75% duty cycle

I'm sure there are other (perhaps better) ways to do this, but I think the following code achieves what you are after: % create...

Plotting periodic sawtooth wave with 25%, 50% and 75% duty cycle

I'm sure there are other (perhaps better) ways to do this, but I think the following code achieves what you are after: % create...

1 year ago | 0

| accepted

Answered

why is my plot only showing 1 diagonal line

First, you probably should move the plot functions outside the while loop. Build up the vectors, then plot! But, the reason ...

why is my plot only showing 1 diagonal line

First, you probably should move the plot functions outside the while loop. Build up the vectors, then plot! But, the reason ...

1 year ago | 0

Answered

How can I draw a line with two points x1, y1 and x2, y2 and assign weight to the edge.

x1 = 0; x2 = 1; y1 = 0; y2 = 1; line([x1 x2], [y1 y2], 'linewidth', 5); text(0.45, 0.55, '10', 'FontSize', 14);

How can I draw a line with two points x1, y1 and x2, y2 and assign weight to the edge.

x1 = 0; x2 = 1; y1 = 0; y2 = 1; line([x1 x2], [y1 y2], 'linewidth', 5); text(0.45, 0.55, '10', 'FontSize', 14);

1 year ago | 0

Answered

how to write equation in legend correctly in latex

MATLAB by default uses a subset of TeX. That's probably all you need: % test data a=1.2345; plot(rand(1,5)); legend(['t_{...

how to write equation in legend correctly in latex

MATLAB by default uses a subset of TeX. That's probably all you need: % test data a=1.2345; plot(rand(1,5)); legend(['t_{...

1 year ago | 1

Answered

Subscript indices must either be real positive integers or logicals.

You've got some funny things going on with the S_x and S_y variables. I made a small change: building up the S_x and S_y values...

Subscript indices must either be real positive integers or logicals.

You've got some funny things going on with the S_x and S_y variables. I made a small change: building up the S_x and S_y values...

1 year ago | 1

| accepted

Answered

How to draw a letter T ? the background is black and the letter itself white

Just add another white block for the top of the T: A = zeros(500, 500); A(100:200, 100:200) = 255; A(50:100, 50:250) = 255; ...

How to draw a letter T ? the background is black and the letter itself white

Just add another white block for the top of the T: A = zeros(500, 500); A(100:200, 100:200) = 255; A(50:100, 50:250) = 255; ...

1 year ago | 1

| accepted

Answered

Decide values of row in matrix for certain row intervals

rows=150001;window=500; res=zeros(rows-window,4); flagstart = [11600 42410 72480 102100 132000]; flagend = [22620 52410 825...

Decide values of row in matrix for certain row intervals

rows=150001;window=500; res=zeros(rows-window,4); flagstart = [11600 42410 72480 102100 132000]; flagend = [22620 52410 825...

1 year ago | 0

| accepted

Answered

Using fft to plot frequency spectrum of sum of rectangular pulses

I think this is what you are after. Mostly, this code just follows the example in the fft documentation, particularly w.r.t. ge...

Using fft to plot frequency spectrum of sum of rectangular pulses

I think this is what you are after. Mostly, this code just follows the example in the fft documentation, particularly w.r.t. ge...

1 year ago | 1

Answered

Histrogram/bar chart plot problem

The code below uses your data and generates a bar chart similar to your sketch. I'm not sure how picky you are about the colors...

Histrogram/bar chart plot problem

The code below uses your data and generates a bar chart similar to your sketch. I'm not sure how picky you are about the colors...

1 year ago | 0

| accepted

Answered

How to specify max. number of outliers on which to apply the Hampel filter?

There's probably a simpler way to do this, but I believe the code below achieves what you are after: % test data x1 = randi([5...

How to specify max. number of outliers on which to apply the Hampel filter?

There's probably a simpler way to do this, but I believe the code below achieves what you are after: % test data x1 = randi([5...

1 year ago | 0

| accepted

Answered

Remove unwanted noise from scatter plot using Matlab

There are many ways to approach this, for example using smoothdata or rmoutliers. Both functions have options to control how th...

Remove unwanted noise from scatter plot using Matlab

There are many ways to approach this, for example using smoothdata or rmoutliers. Both functions have options to control how th...

1 year ago | 0

Answered

How to Create a Surface Plot from Table Data Imported from Excel

Given some test data (attached) similar to yours... ... a surface plot can be created thus... M = readmatrix('testdata.xlsx'...

How to Create a Surface Plot from Table Data Imported from Excel

Given some test data (attached) similar to yours... ... a surface plot can be created thus... M = readmatrix('testdata.xlsx'...

2 years ago | 1

| accepted

Answered

How to use separate locations for axis location and axis labels?

You don't need to set the x-axis location. Delete that line and then use yline to get a line at y = 0: figure time = [0 1 2 3...

How to use separate locations for axis location and axis labels?

You don't need to set the x-axis location. Delete that line and then use yline to get a line at y = 0: figure time = [0 1 2 3...

2 years ago | 0

| accepted

Answered

How to draw sinewave with Scalling

Just shift the values in z up by constant... maxV=100; minV=5; f = 30; fs = 1e4; % samples per second t=...

How to draw sinewave with Scalling

Just shift the values in z up by constant... maxV=100; minV=5; f = 30; fs = 1e4; % samples per second t=...

2 years ago | 0

| accepted

Answered

shift matrix to the right

Perhaps this is what you are looking for: A=[0 0 1 1 0 0 1 1] B=[0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1] m = numel(A); n = numel(B)...

shift matrix to the right

Perhaps this is what you are looking for: A=[0 0 1 1 0 0 1 1] B=[0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1] m = numel(A); n = numel(B)...

2 years ago | 2