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How to find indices of non duplicate rows in a matrix?
>> A = [1 1 2 2 3 4 5 6 6]; >> [n,b]=histc(A,unique(A)); >> A(ismember(b,find(n==1))) ans = 3.00 4.00 ...

5年以上前 | 0

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error converting chars to string
You've previously defined Samples as a cell array (either deliberately or by accident) -- >> Samples={} Samples = 0×0 empty...

5年以上前 | 0

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Splitting data array into sub arrays
>> SIC=[3301, 4502, 3306, 4602, 4510].'; >> splitapply(@median,SIC,findgroups(fix(SIC/100))) ans = 3303.50 450...

5年以上前 | 1

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Adding a second x-axis to each plot in a tiled layout / subplot
The tiled layout object is documented as "A tiled chart layout contains an invisible grid of tiles that covers the entire figur...

5年以上前 | 0

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cell to matrix in matlab
>> X=[{[[2:2:10].' rand(5,1)]},{[[1:2:10].' rand(5,1)]}] X = 1×2 cell array {5×2 double} {5×2 double} >> [X{1}(:,...

5年以上前 | 0

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Input only numbers from .txt file and store numbers
It would be better to write a more parseable text file, at least with a delimiter if not multiple records... With just highleve...

5年以上前 | 0

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How to iterate through the alphabet like Excel does
function rnge=xlsAddr(row,col) % Build Excel cell address from row, column % % RNGE=XLSADDR(ROW,COL) will return an Excel cel...

5年以上前 | 0

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selecting values between vectors and plot the values
isA=(Ax>Bx); ABx=Bx; ABx(isA)=Ax(isA); plot(ABx,max(Ay,By))

5年以上前 | 0

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FindPeaks() of a 1024 x 116 Matrix
findpeaks only works on vector input; just use a loop and pass each column of your array in turn. There's a fair amount of back...

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How to separate weekends from weekdays from an Excel file in MATLAB?
Well, ya' gotsa' start somewhere! We all were newbies once...give it a shot and see how far you get on your own first... Impor...

5年以上前 | 0

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extract or split data from one column in table into several columns
>> s='250ms,500ms / 95, 101, 106, 107 / Avg: 11_right / | bl | _HLG_MLD | (9) vs. Avg: 11_right | bl | _CG | _LOW (8) / FCL';...

5年以上前 | 0

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Delete data in one table, based upon another table
It would be easier to write working code if we knew the actual format of the variables -- is it really a MATLAB table object or ...

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How can I duplicate the array data into a fixed number?
No, you don't have to have the same number of points in both lines to plot them on the same axes. Use plot(x1,y1,x2,y2) or p...

5年以上前 | 0

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if any command to check table values
We don't have the data and can't see the actual result in context -- although the code snippet posted isn't formatted well, that...

5年以上前 | 0

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extract numbers form a column
v=sprintf('%d',double([nan;Q(:,1);nan].'==0)); iStrt=strfind(v,'01').'; iEnd=[strfind(v,'10')-1].'; grpsums=arrayfun(@(i1,i2)...

5年以上前 | 1

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Conditional average (need help with speed)
Grouping variables and rowfun to the rescue... tMeans=rowfun(@(x),mean(x,'omitnan'),mytable,'InputVariables','T','GroupingVaria...

5年以上前 | 0

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monts in year sequence, string, matrix
Add the date to a timetable and retime with aggregation-- tt=timetable(datetime(yr,1,1:365).',data); % make timetable of d...

5年以上前 | 1

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How do I changethe label in a compass graph
Well, the above code commented out pax=gca; so the handle to the axes is either undefined or refers to a probably no longer ex...

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What kind of multiplication is going on here?
The degenerate case of a 1x1 matrix IS a scalar and so '*' reverts to scalar operation. It would be simply too inconvenient i...

5年以上前 | 1

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Loop for randomisation assignment in table columns
From above modifications of IA's original using the idea of a lookup table instead of loop... % set path to where the session 1...

5年以上前 | 1

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Calculating discharge over multiple years
Use a table or timetable and rowfun with grouping variables...a couple lines of code and an anonymous function will do it. Fo...

5年以上前 | 0

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Drop a column from a matrix if one number in that column is less than 30
VAL=30; % don't bury "magic numbers" in code; use variables bigMatrix=bigMatrix(:,all(b...

5年以上前 | 0

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Loop for randomisation assignment in table columns
% prepare lookup table first... ROWS=cellstr(char('WE', 'BC', 'CCC', 'LB', 'RO', 'NN')).'; ROWS=categorical([ROWS;ROWS([4 5 1 ...

5年以上前 | 0

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How do I present an audio signal in a time domain plot using MATLAB, such that the y-axis is in decibel (dB) instead of of a linear scale?
See the attached link https://www.dsprelated.com/freebooks/mdft/Decibels.html In particular, note that "Signal intensity, power...

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extract elements from signal
Don't create new variables, just x=reshape(x,1000,[]).'; and reference the column of interest. If you create new variables, ...

5年以上前 | 2

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export an array to a text file
As documentation for csvwrite says, it is able to write numeric data arrays only; you're trrying to include header data inside t...

5年以上前 | 0

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error in figure in matlab
It is, only you have so many points they're all on top of each other instead of being able to distinguish individual points. Yo...

5年以上前 | 1

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Smart import of random files
"When the instrument creates its output, this is in .dat." AHA! So you created the problem with the spreadsheet yourself, not ...

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Smart import of random files
c=readcell('Input_type_1.xlsx'); % read as cellstr array c=c(~cellfun(@(c)all(ismissing(c)),c,'Unifo...

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Smart import of random files
Save the file as a .csv instead of .xlsx. May have to coerce Excel to not double-quote the strings; I presume there's a way but...

5年以上前 | 0