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Ive J


Last seen: Today 2013 이후 활성

Computational biologist.

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how to prompt user to try again instead of letting MATLAB display "Index in position 1 exceeds array bounds" error message.
a= [1 2 3; 4 5 6; 7 8 9]; askAgain = true; while askAgain position = input ('input a number: '); if posit...

5일 전 | 0

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Errorbar on Box and Whisker Plot
If you want error bars on the same box plots, you can use something like this: tab = table(randi([1, 50], 20, 1), repmat([1; 2]...

6일 전 | 0

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How to extract the data from webread output?
It's always better to first check the RESTful API documentations. In your case, you can get those values either by applying rege...

7일 전 | 1

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why Normal Distribution with Histogram not matching?
This is because histogram shows frequency of your sample, while PDF plots the density. Of course you can change the way histogra...

13일 전 | 0

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how many times is a value repeated in a table
You can play with groupSummary which offers lots of options: tab = table(repmat([20; 50; 100], 20, 1), string((1:60).'), 'Varia...

14일 전 | 0

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How to plot box plots of data of different sizes on the same figure?
You just need to define a grouping array: x1 = randn(128, 1); x2 = randn(100, 1); X = [x1; x2]; grp = [ones(size(x1)); 2.*o...

15일 전 | 0

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want to order and group files
You can try regexp or pattern: dcm = "00022.dcm"; bmp = ["2015220700022_Frame20.bmp", "2015220700023_Frame20.bmp", "2015220700...

16일 전 | 0

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Regression with tall array (Using datastore, CSV) - Error
Well, your data is tall table, and that's what MATLAB complains about: since your first argument is a table, MATLAB thinks y is ...

16일 전 | 0

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Is there a way to get a confidence/probability score on fitrsvm or other regression techniques like fitrensemble using the 'predict' function?
You already answered yourself! % MATLAB doc for fitrsvm load carsmall X = [Horsepower,Weight]; Y = MPG; Mdl = fitrsvm(X,Y)...

17일 전 | 0

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How to adjust size of the legend in large figures?
Try NumColumns property: plot(randn(400, 40), randn(400, 40), '.-') legObj = legend(gca, 'NumColumns', 2);

17일 전 | 0

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Subsets of uncorrelated features
Let R be the pairwise correlation matrix: N = 10; R = rand(N); R(logical(eye(N))) = 1; for i = 1:size(R, 1) - 1 for...

17일 전 | 1

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How can I assign different colors to different bins of a single "bar/barh object"?
Well, you just needed to go through the doc for bar. y = [75 91 105 123.5 131 150 179 203 226 249 281.5]; h = bar(y, 'FaceColo...

17일 전 | 2

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how to draw classification response of machine learning model ? (Ex. Logistic Regression Response)
You can plot predicted probabilities from a logisitc regression model: y = randi([0, 1], 1000, 1); x = randn(1000, 1); mdl ...

22일 전 | 0

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How to allow for multiline input for inputdlg?
Have you tried new line? num_lines = 1; cues = {'lake', 'river', 'water', 'ocean', 'forest'}; index1 = randi([1,5]); answer ...

약 1달 전 | 0

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Ignore NaN value when iterating
arrayfun(@(x)numel(A(x, ~isnan(A(x, :)))), 1:size(A,1)) 5 1 3

4달 전 | 0

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find probability of chi2 test
Based on what you explained it seems you already have the X2 stat. p = 1 - chi2cdf(x, nu) % where x is chi2 stat and nu is df

4달 전 | 0

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Ask for Data Extraction
t = readtable('text.txt'); t.Properties.VariableNames = "col" + (1:size(t, 2)); % set col names 12×3 table col1 col...

5달 전 | 1

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How to change color of imported geometry from .mat file?
h = findobj(gca,'Type','Patch'); h.FaceColor = 'b'; % set it to blue or whatever

5달 전 | 1

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Matrix Multiplication & Splitting
Given your input criteria, you can simply reshape C: sz = size(C, 2); C = reshape(C, 3, 3, sz/3); D = arrayfun(@(i)A*B*C(:,:...

5달 전 | 0

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Removing outliers using standard deviation
groupfilter does the trick cleanTable = groupfilter(yourTable, 'Hour', @(x)~isoutlier(x, 'mean'), 'Price');

5달 전 | 0

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Mean for certain conditions
t = readtable('extracted_table.xlsx'); y = groupsummary(t, {'ID', 'Item', 'Snack'}, @mean, 'Rating'); % mean of Rating for each...

6달 전 | 0

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how to partition data into testing and training
While I don't see any issues with what MATLAB does nor understand your point, you can use something like this: test_idx = rand...

6달 전 | 0

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How to keep only numbers in a cell (.xlsx file)?
x = readcell('test.xlsx') nums = cellfun(@(x)sscanf(x, '%f', 1), x) 1.4420 0.3320 0.3560 0.8530 250.8690...

6달 전 | 1

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fprintf for total sum
doc fprintf An example for a floating point number: X = 2.345674; fprintf('My number is %.2f\n', X) My number is 2.35

6달 전 | 0

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Finding the location of the axis end in normalized coordinates
You just missed the fact that end of axis is starting point + width, try this ax=axes(); p=get(ax,'Position'); annotation('...

6달 전 | 0

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Standarddeviation & mean multiple Matrices
rearrange your matrices into a single 3D matrix. A(:, :, 1) = [1 2; 3 4]; A(:, :, 2) = [5 7; 10 6]; mean(A, 3) 3.0000 ...

6달 전 | 0

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delete positions from a matrix according to a given set of conditions based on matrix elements
One possible solution would be: tab = array2table(data); tab1 = groupsummary(tab, {'data3', 'data4'}) % count VAL3 per each la...

6달 전 | 0

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extract column index of a particular values in the matrix
B = x1(x1 <= 550 & x1 >= 500);

6달 전 | 0

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which x value is making maximum this function.
x = 0:0.1:0.4; y1 = -0.893.*x.^2; [maxY1, maxIdx] = max(abs(y1)); x(maxIdx) % your answer is here

6달 전 | 1

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Summing multiple cell entries
Fmat = sum([F{:}], 2);

6달 전 | 0

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