Community Profile # Scott MacKenzie

### York University

Last seen: Today Active since 2020

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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 ...

alrededor de 9 horas 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...

alrededor de 11 horas 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...

9 días 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...

17 días 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...

19 días 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...

21 días 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...

23 días 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...

26 días 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...

alrededor de 2 meses ago | 0

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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

alrededor de 2 meses ago | 0

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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); ...

alrededor de 2 meses ago | 1

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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]...

2 meses ago | 0

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

2 meses ago | 0

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...

2 meses ago | 0

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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...

2 meses ago | 0

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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...

2 meses ago | 0

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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...

2 meses ago | 0

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

2 meses ago | 1

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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...

2 meses ago | 0

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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:

2 meses ago | 0

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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...

2 meses ago | 0

How can I transform these data into seasonal data?
@Pul. Here's a solution that allows you to get summary statistics by season: load('testdata.mat'); % loads giulia_TT timetable...

2 meses ago | 0

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How can I subtract the times without considering the date in question?
Here's one way to do this: % test data (one month in 30-min increments) dt = datetime(2021,4,1):minutes(30):datetime(2021,5,1)...

2 meses ago | 0

How to plot multiple lines with gray color
Here's one way to do this: p=rand(12,5); figure (2) plot(p, 'color', [.5 .5 .5], 'linewidth', 1.5); % gray lines % put tex...

2 meses ago | 0

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Convert final grade letter into categorical array.
% test data containing student letter grades C = { 'A' 'C' 'D' 'A' 'D' 'B' 'B' 'C' 'A' }; % define C to be categorical C = ...

2 meses ago | 0

how can a make a loop for a double value in Matlab?
It's not clear what 19 variables you have in the table T1, but I suspect your error will disappear via... for i = 1:length(ID) ...

2 meses ago | 0

How to detect negative number in Switch and case statement
Look carefully. Because you are switching on error, your first case expression reduces to error == (error < 0 && Uz > 0) ...

2 meses ago | 0

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How to replace ones and zeros in a logical vector with vectors of corresponding length?
idx = [1 0 0 1 1 0 0]; % appearance of logical index a = [2 3 4]; % the values of a have to replace the ones in indx ...

2 meses ago | 0

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How to convert an array of exponential numbers to am array of whole numbers?
Your question has nothing to do with "converting" numbers. Your question pertains to how numeric values are presented on the di...

2 meses ago | 0

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