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How can I merge a numeric matrix (1 column) to an existing numeric matrix?
Presuming the B vector already exists to match the right size, simply knowing the row number is sufficient... B(sc:end,2)=A;

約7年前 | 0

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plot with two datetick axis
Don't use datenum and datetick, use datetime instead for which plot has builtin support. You should be able to create two indep...

約7年前 | 0

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Can anyone tell me why this function call : [x, ithist] = broyden(f,x0); within my script says x is undefined? broyden.m is supposed to calculate and output x. Am I supposed to define it in my script, because that doesn't seem right or make sense. An
x0 =[0.00001;1]; f = @(u) [(sqrt((x(1) - xs)^2 + (y(1) - u(1))^2 + (zt(1) - zs)^2)/v )- (u(2)); ... ...

約7年前 | 0

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Pairwise difference of datetime vectors (i.e. pdist for time data)
Presuming not excessive precision, one could convert to datenum, compute distances and then return to datetime Seems like a fea...

約7年前 | 1

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how do i derived my hourly data from 60 minute data, daily data from 24 hours, and a month from related days?for energy consumption
Use a timetable and retime

約7年前 | 0

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Can I use Matlab to read in data that's in an unusual layout
A little tedious to set up, but easily-enough handled for a regular file format such as this. First you have to either know the...

約7年前 | 1

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What are the methods and corresponding functions in matlab to fill missing data temporally in rainfall timeseries?
Well, time-based was understood the point of the Q? was whether you were also requesting some specific and recognized in the fie...

約7年前 | 0

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Find column with error and delete it
isStr=find(cellfun(@isstr,table2cell(dataFromTable(1,:)))); if(cell2mat(strfind(dataFromTable{1,isStr},'$$ER'))) dataFromTab...

約7年前 | 0

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What data points does interp1 use for linear interpolation?
inter1 does linear interpolation between points unless you use 'nearest'|'next''|'previous' for the method. It also requires th...

約7年前 | 0

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Help!!! how to search for some xx xx xx xx(hex) in a dat file very fast!!!
If it's performance you're looking for, pass the job off to a grep utility...there are any number of freeware versions available...

約7年前 | 0

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Convert String Array to Numeric matrix and string array
EventVals=str2double(data_events(1:2:end,:)); EventCmnt=data_events(2,:);

約7年前 | 1

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Stacked bar graph with secondary y-axis line graph
[~,~,r]=xlsread('MLQ.xlsx'); % just read the spreadsheet to see what was in it... MLQopt=detectImportOptions('MLQ....

約7年前 | 0

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How to access names of external drive from path?
That's an OS command -- on Windows there's "VOL" >> !vol Volume in drive C is OS Volume Serial Number is ... >>

約7年前 | 0

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fread() help. "Error using fread: Invalid file identifier..."
[filename, pathname]=uigetfile('*.ptu', 'T-Mode data:'); %Opens dialog box to manually select the file using file explorer ...

約7年前 | 1

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Customizing MATLAB Plots and Subplots
The new(ish) yyaxis function to arbitrarily create two y axes and then switch between left and right axes w/o the need of yyplot...

約7年前 | 0

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Select specific data from txt file
Just read the file into memory and do a find() -- since it's an integer that'll be exact. What do you do if there isn't a matc...

約7年前 | 0

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What Is A Scalar String?
A scalar string is simply a string that is not an array of strings...see https://www.mathworks.com/help/fixedpoint/ug/code-gener...

約7年前 | 0

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for loops not working
"The MATLAB way" is to avoid the loops altogether... N=10; M=1000; [X,Y]=meshgrid([1:N],1:M]); func=(X*pi/Lx).^2 +(Y*pi/Lz).^...

約7年前 | 0

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How can I shift the elements in a vector without losing the elements? just shift the order
Sorta' inconsistent definition, but look at >> A=1:10; >> circshift(A(4:end-2),-2) % case 1 ans = 6 7 ...

約7年前 | 0

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How to transform an array into a bottom triangle
On the above assumption, if V is the vector, then N=149; % array size parameter R=V(cumsum([N:-1:1])); ...

約7年前 | 0

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Finding elements of an arrays having specified index numbers
Given you return the indices in vectors ix and iy, then V=A(sub2ind(size(A),ix,iy)); where A is the other array and V will be ...

約7年前 | 2

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Use the index of an element of a subset to find its index in the large set?
tipPt=[2 3 2]; % the two located points smpPt=[2 3 1]; % return their locations in the two arrays, respectively ...

約7年前 | 0

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vertical error bar in loglog plot
hEB=errorbar(x,A,err); hAx=gca; hAx.XScale='log'; hAx.YScale='log'; You'll have to have defined the error magnitude array, e...

約7年前 | 0

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Having multiple lines in a character array for column labels in a heatmap
Unless TMW has finally fixed it, the TickLabel interpreter is pretty brain dead...you can do something like ColumnLabels=strrep...

約7年前 | 0

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Replace categorical value with numeric values
If categorical variable is c, then d=double(c)-1; presuming didn't define them except by default which will be in alphanumeric...

約7年前 | 0

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i need to compare a matrix with a static table
> [interp1(Y(:,1),Y(:,2),X(:,1)) interp1(Z(:,1),Z(:,2),X(:,2)) interp1(A(:,1),A(:,2),X(:,3))] ans = 279.6900 255.4500 247....

約7年前 | 0

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how to find peak frequency value in the ionogram which is from power data (for every height and transmitting frequency )of digisonde data
See doc findpeaks

約7年前 | 0

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msgbox is not displaying the string entered in body
Should be msgbox('Message','Title')

約7年前 | 0

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Generate beta random number without statistics toolbox
Given Ui are uniform random variates Y1=U1/α1 and Y2=U1/β1, such that Y1+Y2<=1, then X=Y1/(Y1+Y2) follows the beta dist...

約7年前 | 0

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how to fit a a curve using gamma fit
See doc gamfit but all the inflection points in the green curve have no chance to be reflected in a fitted function.

約7年前 | 0