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# dpb

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How can I analyse particular portions of an array to use for plotting? Considering dataset of ~1.5 million rows for each variable and ~150,000 locations with 10 values (for each variable) per location
"I’ve imported the data from a table and converted each variable into their own individual arrays,..." That's exactly the wrong...

1일 전 | 0

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select complex numbers from cell array based on the real part
Well, if you want the max() of the real part, then you'll have to limit to only looking at the real part -- max() for complex re...

3일 전 | 0

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Put a cell into a title in plot
Sr=regexp(fileread('data.txt'), '\r?\n', 'split') .'; % reads as a string, not numeric for i=1:size(St); ...

3일 전 | 0

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How to sort a two column vector
s=sortrows(x);

4일 전 | 1

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Avoid +0 when using fprintf %+d
Not w/o some code logic of one form or the other, no. There is no "magic bullet" format descriptor that behaves as desired; as ...

5일 전 | 2

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How to convert the output of this coding to txt file formate using Matlab?
ix1 = (Xs1-x2).^2+(Ys1-y2).^2+(Zs1-z2).^2 < R2^2; scatter3(Xs1(~ix1),Ys1(~ix1),Zs1(~ix1),20,'r','h','filled','MarkerFaceColor',...

6일 전 | 1

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proportion of gender having health issue
Some other things to explore... hScore=randi(100,100,1)/4; % An artificial dataset... ...

6일 전 | 2

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Is there a way to change the range function of xlsread based on a variable input?
Sure (altho it's probably as fast and less hassle to just read read the whole spreadsheet and then just select the results wante...

7일 전 | 0

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How can one show variable values in legend of a plot?
Just build the desired string array -- num2str works nicely here alto you have to ensure the values are in a column vector to av...

8일 전 | 0

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Syntax: var<1d-4
dp=max(max(abs(phi1a-phi1))); if(~(dp>0) & ~(dp<0) ) disp('NaN'); return; end if(dp<1d-4) break; end % THIS LINE could be wr...

8일 전 | 3

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How do I make a variable that is equal to the position of a row in a table by using the name of that row?
fieldnames is specically documented for struct or Java or COM objects at least thru R2019b; I wasn't aware it would return the ...

9일 전 | 0

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질문

Yet Another Excel COM Problem -- SAVEAS
Have a whole bunch of older Excel files that must process -- and for going forward would like to convert them to the current def...

12일 전 | 답변 수: 1 | 0

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You certainly do throw the parentheses around... :) sumenergy2= ((delta_H_T_ref)+ ((delta_Cp)*((T_isoth)-(T_ref))); ...

13일 전 | 0

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graph axes and its scaling
If you haven't, turn your time vector into datetime (if it is actual calendar time) or a duration (if it is elapsed time from so...

15일 전 | 0

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How do I detect a "tab" character in a line of text read by fgetl?
l=fgetl(fid); istab=(l==9); % the fast way... % istab=strfind(l,char(9)); % the char() string stri...

15일 전 | 1

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Modifying Figure Y-Axis Exponent Parameter After YTickLabels are Modified
Don't use manual labels on ticks, just don't put ticks at the unwanted places. When write labels, the EponentMode is set to 'Ma...

16일 전 | 0

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About the usage of for, while and return
With the clarification that operations are the same, then data=xlsread('data.xlsx','B1:B86640'); % preliminaries -- define sto...

18일 전 | 0

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Array loop to find highest value
"Now I want the 5 best values, but I'm afraid if I sort them with the sort function the id's wont match anymore ..." If that's ...

20일 전 | 1

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질문

Indexing to table subset from unique
Have a fairly complex table that contains, amongst other things, a Formula field (altho what the field is is immaterial to the q...

20일 전 | 답변 수: 0 | 0

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I want to plot!!!
You left out some very key information MATLAB told you about... ... contour(x,y,psi); Warning: Matrix is singular to working ...

20일 전 | 0

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Knowing the value in the first and second column of an array, what is the corresponding value in the third column?
Use the MATrix LABoratory features of MATLAB instead of explicit loops where can... width = 0.5; height = 0.1; nIntervalsX = ...

20일 전 | 0

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How to perform mathematical operation in columns on certain elements and make the other elements zero??
Don't try to get too fancy...sometimes just deadahead is the simplest and best (and probably fastest, besides)... a=10; ...

21일 전 | 0

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how to convert the cell to matrix
Presuming the input is a cell array, m... >> cellfun(@(s) sprintf('%d',fliplr(s)),m,'UniformOutput',false) ans = 6×1 cell a...

21일 전 | 0

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How to run a Absolute value for formula when there's a variable?
Because >> y=abs('Temperature'); >> char(y) ans = 'Temperature' >> You passed the literal character string 'Temperatur...

21일 전 | 1

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Interpolation Between Two known data points
You're not looking across the variations in your two variables--another illustration why it's better to not create multiple vari...

24일 전 | 0

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if statement within for within while loop is not fullfilled but loop is exited
if randomizeOrder(randomizeOrder(:,7)==i,5) == randomizeOrder(randomizeOrder(:,7)==i+1,5) == randomizeOrder(randomizeOrder(:...

25일 전 | 0

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apply function to all fields in a structure array
Why the nested structure? That's where the problem arises---convert to a struct array, S as >> S=F1 S = 1×2 struct array ...

25일 전 | 0

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Reading isn't too hard; interpreting what what you have is lacking some information... First, use the detectImportOptions funct...

27일 전 | 0

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Sort variables form lowest to largest but by keeping their name
Per usual, the way in MATLABB is to not used explicitly named variables -- use an array and if you need some auxiliary name/id t...

28일 전 | 0

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HELP: Why poly11 fit is not fitting my data?
>> zX=(X-mean(X))/std(X); >> zY=(Y-mean(Y))/std(Y); >> f=fit([zX,zY],Z,'poly11') Linear model Poly11: f(x,y) = p00...

29일 전 | 0