Community Profile

photo

Andrei Bobrov


Last seen: Today
4.918 total contributions since 2011

Andrei Bobrov's Badges

  • Thankful Level 3
  • Master
  • 36 Month Streak
  • Revival Level 2
  • Knowledgeable Level 4
  • First Answer
  • Scavenger Finisher
  • CUP Challenge Master
  • Commenter
  • Leader
  • Speed Demon
  • Solver

View details...

Contributions in
View by

Answered
Count the number of occurrences in a string vector
s = string({'A';'A';'B';'A';'B';'B';'C';'A';'C'}); out = zeros(numel(s),1); [~,~,c] = unique(s); for i = 1:max(c) lo =...

alrededor de 6 horas ago | 1

| accepted

Answered
Number of sequences with 3 or more ascending numbers
lo = diff(v) > 0; lo = [~lo(1);lo]; lo2 = [lo(2:end);false]|lo; i = cumsum(lo == 0 & lo2).*lo2; j = accumarray(i + 1,1); C ...

1 día ago | 0

Answered
Processing 2D into 3D matrix
modeshapes = sin(phi + reshape(x,1,1,[]));

6 días ago | 0

| accepted

Answered
Adding rows to matrix conditionally
out = [(x(1,1):x(end,1))',repelem(x(:,2),[diff(x(:,1));1])];

7 días ago | 0

Answered
Fill in missing NaNs
This question is a repeat of this question: x = [1;2;3;4;nan;nan;nan;nan;nan;5;7;8;nan;nan;nan;nan;11;11;12;nan;nan;nan;15]; ...

8 días ago | 1

Answered
Filling in missing points
In R2016b: T = readtable('weather_laverton.xlsx','Sheet',1); TT = table2timetable(T); TTout = fillmissing(TT,'linear'); Add ...

9 días ago | 0

Answered
How to get all values existing in arrays/matrices?
[a,~,c] = unique(reshape(myArray',[],1),'stable'); out = [a, accumarray(c,1)]; or out = varfun(@(x)x,array2table(myArray(:)),...

15 días ago | 1

| accepted

Answered
find values in vector present in cell array
out = cell(size(cA)); for i = 1:numel(out) x = cA{i}'; [~,out{i}] = ismember(x(:)',V); end or with cellfun [~,out]...

22 días ago | 1

| accepted

Answered
how to extract n rows in a matrix column iteratively?
out = num2cell(reshape(A,3,[]),1); or out = accumarray(ceil((1:numel(A))'/3),A,[],@(x){x});

alrededor de 1 mes ago | 0

Answered
DOT type element wise multiplication of two 2-D matrices with array expansion (3-D)
out3D = A .* permute(B,[3,1,2]); % for R2016a and later out3D = bsxfun(@times,A, permute(B,[3,1,2])); % earlier R2016a

alrededor de 1 mes ago | 0

| accepted

Answered
Convert a vector to single element
signal = dec2bin((0:255)'); or fullfact([2 2 2 2 2 2 2]) - 1; in your case for i = 256:-1:1 signal(i,:) = dec2bin(i-1,...

alrededor de 2 meses ago | 1

| accepted

Answered
Extracting a vector from elements of a matrices that are in a cell structure.
V = cat(1,C{:}); V(:,1)' V(:,2)'

alrededor de 2 meses ago | 0

| accepted

Answered
converting a matrix sequentially in to single column
Let A - your array. k = 30; [m,n] = size(A); out = reshape(permute(reshape(A,k,[],n),[1,3,2]),[],n);

alrededor de 2 meses ago | 0

| accepted

Answered
How to convert datenum to datetime in a MATLAB Table
a=[2 737735.191331019 6 737735.182129630 3 737735.182013889 7 737735.141481482]; T...

3 meses ago | 0

Answered
Unique Number Assignment To Each Time
a=[1.1, 1.1, 1.1, 1.2, 1.2, 1.2, 2.1, 2.1, 2.1]' [i,g]=findgroups(a); out = i - 1;

3 meses ago | 0

| accepted

Answered
Find max value with multiple conditions
T=readtable('wave height data.xlsx'); [r,rn] = findgroups(T(:,1)); [c,cn] = findgroups(T(:,2)); out = accumarray([r,c],T.Wave...

3 meses ago | 1

| accepted

Answered
Count smaller than 15 cells in the table coulumns
T = varfun(@funir,results_excel,'I',2:5); T.Properties.VariableNames = results_excel.Properties.VariableNames(2:end); T.statio...

3 meses ago | 0

Answered
Is there a way to find the max value in an array without using the "max" command?
Let A - your array. B = A(:); max_value = B(all(B - B' <= 0));

3 meses ago | 0

Answered
Consolidating counts & sum by Year Range
y = [2001, 2002, 2005 2003, 2004, 2007]; A = [2001 2002 2001 2003 2003 2003 2004 2004 2004 2004 2004 2007; 1 ...

3 meses ago | 1

| accepted

Answered
Convert Columns Arrays to numeric
...how can I know the data type of the columns? varfun(@class,combine) solution: load('data.mat') combine = [combine,rowfu...

3 meses ago | 1

| accepted

Answered
Matrix dimensions must agree error in if loop
day = input('What day is today? -> ', 's'); lo = any(strcmpi(day,{'saturday','sunday'})); if lo disp(['Its ' day ' ! ...

3 meses ago | 0

| accepted

Answered
How to solve the following exercise?
function out = find_neighbor(M,i,j) out = all(ismember(1:M(i,j)-1,M(i-1:i+1,j-1:j+1))); end

3 meses ago | 1

| accepted

Answered
Collect matrix values by using a "for" loop
Let A - your array. out = reshape(A.',[],1);

3 meses ago | 0

| accepted

Answered
How can I convert 2 column matrix to a cell array?
T = readtable('path\to\your\xls\file\matrix.xlsx','ReadVariableNames',0); T.Var3 = str2double(T.Var3); T = T(any(T{:,1:2} ~= 0...

3 meses ago | 0

Answered
find common elements from cell array and remove it
out = A(~ismember([A{:}],[B{:}]));

3 meses ago | 0

| accepted

Answered
Adding values from columns 1:i for each column for a new matrix of the same size
Let A - your array (442 x 25) out = cumsum(A,2);

3 meses ago | 0

| accepted

Answered
How to replace elements of matrix by elemts from array
out = x(NewV);

3 meses ago | 0

Answered
Find the median row of a binary column and replace the column with just the median row
I = imread('line.png'); bw = im2double(rgb2gray(I)); [i,j] = find(bw); [n,g] = findgroups(j); idx = floor(splitapply(@medi...

3 meses ago | 0

Answered
Extracting values from a cell array into new arrays
CC = cat(3,C{:}); [m,n,k] = size(CC); Z = permute(repmat(b,1,1,n),[1,3,2]); out = CC(sub2ind([m,n,k],Z(:,:,2),repmat(1:n,size...

3 meses ago | 0

| accepted

Load more