Udit Gupta

Last seen: 5 years ago | Active since 2014

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Professional Interests: Signal Processing, Eclectro-acoustics, Machine Learning, Music Information Retrieval

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'subsindex' error when setting figure position. What is going on?
I am trying to resize a figure as shown H = figure; set(H,'Position',[200 200 800 200]) I get the error Function...

9 years ago | 1 answer | 1

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Question

Why is there a permission error when repeat writing to excel file?
I am writing results of multiple analyses to different sheets of the same excel file using "writetable" command. The first inst...

9 years ago | 11 answers | 6

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Text in a figure: Increasing Font Size
You can either include the option 'manual' in your *clabel* call and use your mouse to place the labels; or you can use the 'Lab...

9 years ago | 0

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Help with data extraction script
Try using the *readtable* function. This imports tabular data into matlab. Alternatively you can use the "Import Data" button...

10 years ago | 0

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How to design a bandpass filter
The easiest way is to use the Filter Design and Analysis Tool. Just type |fdatool| in matlab command window. This needs Signal P...

10 years ago | 0

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Merging two tables based on time interval
You can use t = interp1(sample_time,tableB.Time,'nearest'); if abs(sample_time-t <= 40/(24*60)) <Update medicat...

10 years ago | 0

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how to calculate the probability under a pdf curve and divide it into different sections (areas)?
Assuming you have the curves as a matlab vector, you can use the *trapz* function to find area under it. See http://www.mathw...

10 years ago | 1

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weighted average w/ matlab
You can do something like - weight=normpdf(range,centerPoint,spread); wAvg = sum(Y(range).*weight)/sum(weight); In you...

10 years ago | 1

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Question

Is there a way to convert function handles to nan equivalent function handles?
I am passing a cell array of function handles to my function. Typically a user might pass something like- {@sum,@median,@mea...

10 years ago | 1 answer | 0

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How to find t test of two independent samples in MatLab?
Use the function *ttest2* from matlab statistics toolbox. (http://www.mathworks.com/help/stats/ttest2.html)

11 years ago | 2

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Anyone know the error checking for special characters
You can use regular expressions. The code will go something like this - if any(regexp(str,'[^_a-zA-Z0-9]+')) <error c...

11 years ago | 0

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Save PDF for Latex problems in resolution
I do the following operations before saving my figures for latex set(gcf,'Units','Inches'); pos = get(gcf,'Position'); s...

11 years ago | 0

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sprintf with leading minus sign
use sprintf('%6.2f',abs(x))

11 years ago | 0

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How to do a t-test with repeated measurements from 3 different devices?
You can do it in three steps. H1=ttest(X(1:30),12); H2=ttest(X(31,60),12); H3=ttest(X(61,100),12); If you wa...

11 years ago | 0

Question

How to make the legend selective?
I have a bunch of algorithms I am testing for statistical significance. I wrote a script to generate and save plots which I can ...

11 years ago | 2 answers | 0

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Question

Wrong color showed by "imagesc" function, what am I doing wrong?
Hi I have a 3x3 matrix of p-values and I want to display it using a colored grid. I am using the "imagesc" function with a "Copp...

11 years ago | 1 answer | 0

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Prediction based on previous historical data
You can use mtlabs Curve Fitting tool (cftool). If you don't have that search for any linear regression or linear interpolation ...

11 years ago | 0

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Batch process text files
You can use - fileName = [input_directory filelabels(i).name]; That should solve the issue.

11 years ago | 0

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how to generate random points in a line
For each line (edge) of the polyhedron you can write it's equation as (y - y1) = (y1 - y2)(x - x1)/(x1 - x2) So in case...

11 years ago | 0

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Question

How to check if a figure is closed using the big red 'X' mark?
Hi! I am using a gui in my application. There are 'Ok' and 'Cancel' buttons there which upon clicking close the figure and do so...

11 years ago | 1 answer | 2

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Question

Is there a tool/method to determine the versions of Matlab my code is compatible with.
Hi! I sometimes have to distribute Matlab code to my students. I work with a university site license, so I usually have the late...

12 years ago | 1 answer | 0

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creating a data array from a matrix
This is simple if you use matlab lower triangle functions. See the example code below please. A = magic(39) % Your Martix ...

12 years ago | 2

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Cell contents assignment to a non-cell array object.
Instead of x=input('Dame el valor x0 inicial'); x{1}=x; use temp=input('Dame el valor x0 inicial'); x{1}=temp;

12 years ago | 0

12 years ago | 0

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where did tstool go?
This is from the documentation "tstool will be removed in a future release. To create a time series object, use timeseries...

12 years ago | 0

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Extend a vector by extending its elements
If your vector is X. reshape(repmat(X,d,1),1,[]) should do the trick. Example - >> X = [1 2 3 4]; >> d=4; ...

12 years ago | 1

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Answered
arg(Z) is the function returns argument of the complex number Z. but it is showing error while executing arg(1+i) as" Undefined function 'arg' for input arguments of type 'double' ". Can anyone help me?.do u need to convert double to complex?. put u
No such function as arg. Use angle(1+i)

12 years ago | 0

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How to ensure a constant amplitude for a sin wave plot ?
I think if you increase the time resolution, that should solve your problem.

12 years ago | 0

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Answered
How to print the first 100 primes including 1 as a vector
To print prime numbers less than 100 use primeNums = [1 primes(100)] See - http://www.mathworks.com/help/matlab/ref/pr...

12 years ago | 0

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How to avoid inf
Log of zero is -Inf. To avoid that add a small number before taking the log. For example - D = log(normcdf() - normcdf() ...

12 years ago | 0

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