**Statistics**

RANK**224**

of 239,432

REPUTATION**320**

CONTRIBUTIONS

**17** Questions

**95** Answers

ANSWER ACCEPTANCE **
70.59%
**

VOTES RECEIVED**28**

CONTRIBUTIONS**0 Posts**

CONTRIBUTIONS**0** Public Channels

AVERAGE RATING

CONTRIBUTIONS**0** Highlights

AVERAGE NO. OF LIKES

**Content Feed**

Submitted

bfilereader

bfilereader: Efficient processing of big delimited files in MATLAB

3 hours ago | 0 downloads |

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...

6 days ago | 0

| accepted

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]...

8 days ago | 0

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...

9 days ago | 1

| accepted

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...

15 days ago | 0

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...

16 days ago | 0

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...

17 days ago | 0

| accepted

want to order and group files

You can try regexp or pattern: dcm = "00022.dcm"; bmp = ["2015220700022_Frame20.bmp", "2015220700023_Frame20.bmp", "2015220700...

17 days ago | 0

| accepted

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 ...

17 days ago | 0

| accepted

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)...

19 days ago | 0

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);

19 days ago | 0

| accepted

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...

19 days ago | 1

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...

19 days ago | 2

| accepted

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 ...

24 days ago | 0

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 ...

1 month ago | 0

Ignore NaN value when iterating

arrayfun(@(x)numel(A(x, ~isnan(A(x, :)))), 1:size(A,1)) 5 1 3

4 months ago | 0

| accepted

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

4 months ago | 0

| accepted

Ask for Data Extraction

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

5 months ago | 1

How to change color of imported geometry from .mat file?

h = findobj(gca,'Type','Patch'); h.FaceColor = 'b'; % set it to blue or whatever

5 months ago | 1

| accepted

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(:,:...

5 months ago | 0

| accepted

Removing outliers using standard deviation

groupfilter does the trick cleanTable = groupfilter(yourTable, 'Hour', @(x)~isoutlier(x, 'mean'), 'Price');

5 months ago | 0

| accepted

Mean for certain conditions

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

6 months ago | 0

| accepted

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...

6 months ago | 0

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...

6 months ago | 1

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

6 months ago | 0

| accepted

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('...

6 months ago | 0

| accepted

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 ...

6 months ago | 0

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...

6 months ago | 0

| accepted

extract column index of a particular values in the matrix

B = x1(x1 <= 550 & x1 >= 500);

6 months ago | 0

| accepted

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

6 months ago | 1