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Content Feed
How do I pull out from a table, the total mean of one item based on a particular condition (for several subjects), and then compute the difference in mean values?
tMEANS=rowfun(@mean,tData,'GroupingVariables'{'ConditionZ'},'InputVariables','ItemA','OutputVariableNames','GroupedMeans'); See...
14 hours ago | 0
Help creating loop that converts text to numbers
>> A='Now is the time...'; >> format short >> disp(double(A)) 78 111 119 32 105 115 32 116 104 101 ...
18 hours ago | 0
Removing quotations from table display
It's more a sanity check for the user to make sure their values are correct for what they expect. And there's where the purpose...
1 day ago | 0
fwrite ascii output error
I see no such thing... >> fid=fopen('test2.dat'); fread(fid,'*int16') fid=fclose(fid); ans = 2×1 int16 column vector ...
2 days ago | 0
How to reform cell into a vector of strings and text
Two of many ways to deal with the cellstr -- As string array >> S=string(split(C,',')); S=S(S~="") S = 6×1 string array ...
2 days ago | 0
How do I swap 2 rows of a cell array?
One way... >> C=num2cell(randi(10,3,2)) C = 3×2 cell array {[5]} {[1]} {[9]} {[5]} {[6]} {[5]} >> ...
2 days ago | 0
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how to find the nearest value?
The builtin way in MATLAB is interp1 >> A=[1:6]; >> B=flip(A)+0.1; >> posn=[10:10:60]; >> C=posn(interp1(B,A,A,'nearest','ex...
2 days ago | 0
Problems with function num2str
Well, having a file helps (as always)... >> DatosInfo=ncinfo('..\Answers\DatosMarzoD1.nc') % see what's in the file... DatosIn...
2 days ago | 1
| accepted
How to put endpoint on Bar graph
Like maybe? There's a klunky example at the doc for bar, but it is far simpler than the multi-step illustration to write it ...
3 days ago | 0
How to calculate standar deviation and trend in each row of data
The input arguments for std include a flag for the weighting for the divisor and/or the option to compute a weighted standard de...
3 days ago | 0
Multiple axes in a subplot
It's a pain -- MathWorks doesn't think you're supposed to ever want to do that; there are no builtin tools to do it. There may ...
5 days ago | 0
how to plot each bin of data individually?
OK, here's another example; I'll add it as its own Answer -- carrying on from the above uBin=unique(tD.Bin); for i=uBin(:).' ...
5 days ago | 1
Reshaping array with specific order
Can't be done with only reshape. You have only 10 elements in A and the requested output array requires 20. OTOH, it's easy en...
5 days ago | 0
Convert cell array to excel - problem with nested cells
Try something like l=0; for i=1:size(M2,1) for j=1:size(M2,2) l=l+1; writecell(M2(j,i),'M2.xls','Range',"A"+...
6 days ago | 0
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Removing automatic variable names in array2table or writetable and adding some text to the header of output file
As @Ive J points out, define variable names as desired. NB there's no need for intermediate variables here, either--if you alre...
6 days ago | 0
how to plot each bin of data individually?
As per usual, would be easier to demonstrate with some real data to work with...but tD=table(repmat([0:23].',4,1),randi([150 20...
6 days ago | 0
| accepted
Why does the unique() function give an unexpected extra output here?
>> load ..\Answers\datestrings_of_problem_times.mat >> whos d* Name Size Byte...
6 days ago | 1
| accepted
Excel MMULT on MATLAB for different matrix dimensions.
MATLAB being defined as the MATrix LABoratory follows conventional matrix algebra rules -- >> A=[0.29;-1.55;2.09;0.782]; >> R=...
7 days ago | 1
| accepted
Array indices must be positive integers or logical values.
In ... i=0; while dt<ts; d1=g-0.5.*rho.*V0.^2*(s/m).*Cd; phiAvg=d1; V(i)=V0+dt.*phiAvg; V0=V; t(i)=t...
7 days ago | 1
How to fix: Index Exceeds Matrix Dimensions.
>> w1{1}=fix(randi([-10000,10000],3,1)); >> whos w1 Name Size Bytes Class Attributes w1 1x1 ...
7 days ago | 0
Replace text in a struct with new values
The problem is the string you're building for the substitution doesn't match the actual string in the struct substring owing to ...
7 days ago | 0
different number of delimiters error using readtable function
Use import options object -- although to write a fully generic import code you'll have to scan the file to find the number of he...
8 days ago | 1
| accepted
How can I include absent group names in table grouping results?
Well, unless the data are in the table, there's not going to be anything for groupsummary to operate over to tell it those other...
8 days ago | 0
I can't understand the following MATLAB code documentation
This isn't documentation, this is actual MATLAB code. The first section is a script; the second is a function which is called b...
8 days ago | 1
How to show that calculation is going in MATLAB App
An outline of the progress dialog implementation I used for one app... % Button pushed function: UpdateButton function ...
11 days ago | 0
How to make an if-statement that finds whether a 1x5 column has 4 of the rows the value 0?
Just a somewhat pedantic comment on details of notation first -- If the matrix is 1x5, it would be matrix = [0 0 0 241 0] inst...
11 days ago | 0
How to extract data stored in a matrix and in a specific range of columns whose number is stored in another matrix?
It would be much simpler if you would use a table for each variable and include the ParticipantID as a variable instead. Howeve...
17 days ago | 0
Matlab default font monospace is not a wise choice
Can't say as it's been a problem for me, no... But, you can change it to anything installed on your system -- go to Preferenc...
17 days ago | 0
Converting 1D indexed array to 2D matrix
You don't need to convert the linear addresses to indices to assign them to the array. If you have, indeed, segregated the alti...
19 days ago | 0
| accepted
How to get such legend in MATLAB?
Use the 'DisplayName' property for the desired line types to be plotted -- you'll need two lines drawn with just the solid line ...
19 days ago | 0
