Community Profile # Scott MacKenzie

### York University

Last seen: Today Active since 2020

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find the lowest value in a selection of data
[m, idx] = min(T(S1,6)); % minimum value in column 6, as per S1 x = T(idx,5); % value in column 5 at same location/r...

ungefär 2 timmar ago | 0

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Says "error using plot, vectors must be the same length"
Just a simple mistake. Change the 3rd line to xx1=linspace(0,8.*pi,100); Or, for higher resolution, change all the linspace f...

ungefär 18 timmar ago | 1

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Replacing some elements in the row with maximum value along the row
There might be a simpler solution, but this seems to work: A=[1 2 3 0 0; 7 4 5 1 0; 2 4 6 0 3] for i=1:size(A,1) A(i,...

3 dagar ago | 0

How to prevent Matlab from rounding numbers when it saves them to a variable?
The rounding you are observing occurs through the num2str function. You can control this using one of the other variants of num...

3 dagar ago | 0

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plotting 2 time series with errorbars along double y axis
I think this is more-or-less what you are after, based on the figure posted: % test data x = 1:10; A = [2 8 6 11 18 19 16 22 ...

4 dagar ago | 0

How to plot x and y error bars together with the data points?
Something like this seems to work: % test data x = randi([2 8],1,5); y = randi([2 8],1,5); error_x = rand(1,5); error_y = r...

4 dagar ago | 0

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The loop is continuously running
Your loop is fine, but is inefficient and takes a long time to execute. Instead of the loop, try this: [Lia, Locb] = ismember(T...

4 dagar ago | 0

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How to grow a vector in a loop?
One approach is to declare coeff as an empty array before the first for-statement: coeff = []; then add new values to the end ...

6 dagar ago | 0

How to create randi function between 0-500
Just use the imin-imax version of randi. For example n = randi([0, 500], 50, 1); generates a column vector of random integers...

6 dagar ago | 0

Question

Using F1 for help, gives help for wrong function
Consider this code snippet: plot(x, y1); % 2D line plot hold on; plot(x, y2); % 2D line plot plot(p); % polyshape plo...

15 dagar ago | 1 answer | 0

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Filling in missing data with previous data to perform calculations
Since you define bad or erroneous data as values equal to 500 or values less than 60, how about this. Replace the erroneous val...

23 dagar ago | 1

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Repeated Measure ANOVA in MATLAB for voice parameter significance
Here's what I put together. I really don't like the table created by ranova, so I'm including a function I use to convert the r...

25 dagar ago | 0

p value for two sets having variable x and y
Since for each system, y is the measured response for x, you can reduce the data for that set to x-y. Also, since the systems u...

27 dagar ago | 0

Question

ranksum function is purportedly the same as the Mann-Whitney U test, but the results differ. Is there a reason why?
I've written a script to implement the Mann-Whitney U non-parametric test. As a guide, I used a data set (attached) and example...

29 dagar ago | 0 answers | 0

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How do you print the F-stat in a multcompare test?
@Darla Bonagura There is no F-statistic for post hoc pairwise comparisons tests such as Bonferonni, Scheffe, and so on. There i...

ungefär en månad ago | 0

Replacing Empty Cells by NaN
You can use fillmissing and specify the fill value for each column. Obviously, the fill values depend on the data type in the c...

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Remove dimension from high dimensional array
Try this... M = rand(10, 8, 10, 8, 6, 7, 8, 9); whos M(:,:,:,:,2:end,:,:,:) = []; N = squeeze(M); whos

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Repeat a cumulative sum in a matrix
Here's a way to do this without a loop: % test data (monthly returns for many investments for 252 months) M = rand(2784,252); ...

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How can I change the interval on the y-axis?
Here's some example code on how to control the "ticks": x = 1:5; y = randi(100, 1, 5); plot(x,y); set(gca, 'ylim', [0 100]...

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How to put the marker data over the curve fitting line?

How can I transform these data into seasonal data?
Note: Code in comment moved here... load('DATI_MAR_mensili'); % NOTE: loads a table with 'Year' and 'Month' columns % add...

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How to Calculate Area Between a Curve and Two Lines?
At the end of your code, add... x = D_Curve_PD_KPe; y = D_Curve_PD_KDe; cropLogical = x > 0; x = x(cropLogical); y = y(cr...

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How can I store the value of variable 'dist_5thwheel_to_second_axle_sem2_itr' in array/vector format with every for loop iteration such that previous value stays as well? ?
You've got a bug in the setup of your loops. For the inner loop, change for i2 = 1:counter1 to for i2 = 1:counter2...

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Function that checks for particular key press?
You seem to be using a custom toolbox that I don't have. However, assuming you can use built-in MATLAB functions, the tic and t...

Something like this will work. I'm only showing the inner for-loop. fprintf('%6s%6s\n\n', 'x', 'y'); for n=1:length...

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how to find area under curve for every 10msec?
Here's solution that shows the slope (derivative) and area (integral) sample-to-sample in the signal. The sample period is 10 m...

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How to have a just specific part of a plot?
Follow the plot command with... axis([0 400 0 120]); axis off; set(gcf,'color','w'); Output:

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Add legend to plot colored by colormap function
One approach is to do three scatters, one for each value in the 3rd column in your data. Here's the general idea using a modifi...