Community Profile

photo

Andrei Bobrov


Last seen: 1 day ago
4,909 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
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

2 days 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,...

6 days 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)'

6 days 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);

6 days 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...

1 month 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;

1 month 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...

1 month 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...

1 month 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));

1 month 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 ...

1 month 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...

1 month 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 ' ! ...

1 month 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

1 month ago | 1

| accepted

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

2 months 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...

2 months ago | 0

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

2 months 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);

2 months ago | 0

| accepted

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

2 months 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...

2 months 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...

2 months ago | 0

| accepted

Answered
How would I create a matrix from the following strings
T = readtable('Path\your\txt\file\ThinPlateNodes.txt'); T.Varend = str2double(regexp(T{:,end},'(\-)?\d+(\.\d+e\-\d+)?(?=\}$)','...

2 months ago | 1

Answered
Finding Unique values for First Row of a Matrix
Let A - your array. output = A(1,:); for i = 2:numel(output) u = unique([output(1:i-1)';A(:,i)]); output(i) = u(i); ...

2 months ago | 0

| accepted

Answered
Index Exceeds Matrix Dimensions
T = readtable('sample.xlsx','ReadVariableNames',0); T.Properties.VariableNames = {'data','Longitude','Lattitude','altitude','De...

2 months ago | 0

| accepted

Answered
Creating a new matrix based on the data from other two matrices
out = reshape([reshape(g1',2,[],2);reshape(g2',3,[],2)],[],2)'

2 months ago | 1

| accepted

Answered
How to normalize a vector considering both maximum and the sum of values?
Please run follow m - file: SN = 8700; Nmx = 9900; nmn = fzero(@(x)func1(x,Nmx,SN,A),-10000); [~,N] = func1(nmn,Nmx,SN,A);...

2 months ago | 0

Answered
Converting a cell array into a matrix of stipulated number of columns and rows
Let C - your cell array. if cells sizes are the same: out = reshape(cat(2,C{:}),[],4); if not the same: out = cell2mat(cel...

3 months ago | 1

| accepted

Answered
how to generate matrix with any size in same pattern
n = 5; out = full(spdiags(ones(n,1)*[1 -2 1],-1:1,n,n)); or out = zeros(n); out([2:n+1:end,n+1:n+1:end]) = 1; out(1:n+1:end...

3 months ago | 0

Answered
Mean of certain elements within a matrix
Here A - your array (m x 6) [m,n] = size(A); i = repmat((0:m-1)',1,n-1); i(:,end-1:end) = circshift(i(:,end-1:end),-1); i = ...

3 months ago | 0

Answered
Use of backslash while calculating the product of inverse of a matrix and another matrix
Maybe for "second way": xt = (D+omg*L)\((D*(1-omg)-omg*U)*xn+omg*((D+omg*L)\B));

3 months ago | 0

| accepted

Load more