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dpb


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Answered
Create a logistical variable based on time range
readtable is a convenienty byway on the way to a timetable which will undoubtedly be your friend... tt=readtable('Forum_aq_data...

11 hours ago | 0

Answered
Plotting an array of vectors
Your data are nothing at all like that of the other figures; hence it's not surprising they don't plot similar-looking graphs. ...

14 hours ago | 0

Answered
Sum across columns with shift
May be some other more clever indexing, but the "deadahead" thing that comes to mind if I understand the desire >> a=1:18;a=res...

3 days ago | 0

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Answered
Scatter Plot with different "markers" and "data labels"
Adam posted first but will add slightly different way to get to same place (sans some of the finishing niceties...) Why scatter...

5 days ago | 1

Answered
How to reshape an array in a specific manner
>> reshape(a,3,[]).' ans = 1 2 3 1 2 3 1 2 3 1 2 3 >>

6 days ago | 0

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Answered
How can I get information that a 'uisave' command was aborted?
No can do. Less than primo "Quality of Implemenation" that TMW didn't have an optional return value from uisave >> fn=uisave('...

11 days ago | 0

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Answered
How to sort a vector according to another vector?
R=['a':'d'].'; % So can identify elements of R % the engine [~,ix]=sort(ranks); % the result... >> R(ix) ans = 4×1 char...

11 days ago | 0

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Answered
Question on why tilde cannot return the opposite statement result
Q4_ans_test2 = mean( adultdata.hours_per_week(adultdata.age>30 & ~(adultdata.age>50))); Without the parentheses, the ~operator ...

11 days ago | 1

Answered
Fractions as array indices in for loop
Short answer? "Because!" TMW hath so decreed. I'm sure it's mostly performance related as well as ease of code development an...

12 days ago | 0

Answered
row from matrix by argument
m=randi(200,4) % sample data m = 125 95 46 63 118 47 35 185 42 169 46 87 ...

12 days ago | 0

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Answered
Counts the number of times the signal crosses zero
Use zcd = dsp.ZeroCrossingDetector; to create the object per the documentation. Then you pass that object the data... numZero...

12 days ago | 0

Answered
Looping through different sheets/sheet names in each loop to access data
You've embedded the text string '({SheetNames}.(iSheetData}' in the readtable call instead of using the variable Sheetnames. Ju...

12 days ago | 0

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Answered
Deleting Characters from String and Repeating
Well, I don't know how you get L=96 from 50 bytes and I don't think it's likely what you're really going to need, but.. Given t...

12 days ago | 0

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Answered
plot 3D minimum value of a function
Don't think it could be any easier...look at the following from one of the surf examples: [X,Y,Z] = peaks(25); CO(:,:,1) = zer...

14 days ago | 0

Answered
Plot graph with different markers
See <Marker in Graphplot properties>. Pass an index array to the position of the desired marker type as the 'Marker' property. ...

14 days ago | 0

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Answered
Concatenating strings w/ character with while loops
>> myname = 'Nate Johnson'; >> split(myname) ans = 2×1 cell array {'Nate' } {'Johnson'} >> presuming the nex...

14 days ago | 0

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Answered
How to find the name of the first filed of a struct?
If the struct variable is s, then name=fieldnames(s); name=name(1); No way to write the second-level addressing w/o the inter...

14 days ago | 1

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Answered
Replace NaN with Blanks
Can't be done--a double array has to be regular in both dimension; can't have holes. Only possibility is to convert to a cell a...

15 days ago | 0

Answered
fprintf and fscanf same format fail to read file. appreciate help
MATLAB is NOT Fortran. As Stephen notes above and is documented, fscanf returns a single array of a given class; if there are a...

16 days ago | 1

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Answered
fprintf and fscanf same format fail to read file. appreciate help
fprintf(fid,'%5i%5i %17.4E%17.4E\r\n', A); will write A in column-major order, not row-major as you're trying to read it in l...

16 days ago | 0

Answered
How to combine datetime and duration columns to form 1 new datetime column in table
Add the duration to the date... Starting with: t = 3×3 table Date Time Data ___________ ____...

17 days ago | 5

Answered
How to Delete certain rows in a Matrix
Use indexing expressions... N1=15; % number to save N2=90; ...

17 days ago | 1

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Answered
How to customize the subplots?
Just make the additional adjustments to axes/line properties in each subplot as you create it. As you've written it, that means...

18 days ago | 1

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Answered
Updating a matrix through a loop
>> nR=sum(m~=0,2); % the number by row nonzero entries >> m(:,any(m(nR==max(nR),:),1))=[] % remove colu...

19 days ago | 0

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How do I make text color black when using the function insertText
Read the rest of the documentation... 'BoxColor' — Text box color 'yellow' (default) | character vector | cell array of chara...

20 days ago | 1

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Answered
MATLAB showing two equal numbers as not equal to each other
Not remembering floating point rounding. Try principal_stress(1,1) - principal_stress(2,1) and see what the result is. You'l...

21 days ago | 0

Answered
converts a point in cartesian to cylindrical and spherical cooridantes(error:getting same answer in cylindrical & spherical coordinates)
if x,y > 0 phi = atan(y/x); elseif x,y < 0 phi = atan(y/x)+pi; elseif x>0 && y<0 The if statements are bad syntax ...

23 days ago | 0

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Answered
Indexing dates yearly and quarterly.
Use a timetable and retime with a custom method function.

23 days ago | 1

Answered
How to plot a histogram along a curve
Well, your data is rather unique (so to speak :) ): I was trying to figure out how you did the opacity thing in knowing the rel...

25 days ago | 0

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