# Ramesh Bala

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**Content Feed**

Question

Getting error as array indices must be positive integers or logical values in slope calculation.

My R matrix is 512x43 and I would like to calculate slope by central diff from row wise values. It shows logical values error ?...

1 month ago | 2 answers | 0

### 2

answersQuestion

Stacked plot /waterfall plots to visulaise figures

I have in total 6 signals and would like to see all in a single plot.Since all having same X axis and Y axis (shall normalise it...

2 months ago | 1 answer | 0

### 1

answerQuestion

App designer : Unable to read imported data to table of 7 columns

I tried to import a text file and then show it in a table of 101 rows x 7 columns ( data is like that) using push button in App...

2 months ago | 0 answers | 0

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answersQuestion

Get values of the particular line from surf plot

I'm intersted to get all the values of the line 2- curve - marked in figure load('jj.mat'); A1 = jj; figure A1(A1>0.05) =...

2 months ago | 1 answer | 0

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answerQuestion

Call contents of one pushbutton to be used as content for another push button

Dear all, I tried to import a text file via a pushbutton in app designer and it works.Now I want to use let's say 1st column o...

2 months ago | 0 answers | 0

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answersQuestion

How to find the maximum of peaks ?

I want to find the first maximum 4 peaks in loop.My code finds all the peaks,how can I find only 4 and plot them ? A= load ('ZT...

2 months ago | 1 answer | 0

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answerQuestion

How to alter data (multiply) from all the columns of multiple text files in a folder

I have multiple text files locate in a folder.The names of the text files varies.How shall call them & multiply all the values i...

3 months ago | 1 answer | 0

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answerQuestion

FFT of single max sided from signal

I'm trying to get frequency of signal.But after applying FFT it doesn't shows 200e3 (which is given) ? Attaching the code and p...

7 months ago | 1 answer | 0

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answerQuestion

Index value intersection query in matlab

I'm trying to calculate the intersection value of x,y from a matrix. The loop seems correct but the values that I get seems wro...

7 months ago | 1 answer | 0

### 1

answerQuestion

How to plot magnitude vs length from magnitude vs time plot

I have the magnitude (amplitude) vs time Y.X values obtained. I would like to know how can I plot magnitude vs length of the sp...

8 months ago | 1 answer | 1

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answerQuestion

How to make Triu in reverse axis for triangular matrices ?

The function triu makes the upper triangular matrix in the shape of L . How shall I reverse it like to make it run in opposite...

11 months ago | 1 answer | 0

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answerQuestion

Polar plot using polyfit

I'm trying to fit the VALUES to make a polar plot but it seems I couldn't fit one value 1400e2 which the polyfit doesn't take ...

1 year ago | 3 answers | 0

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answersQuestion

I have 2D plot,how shall I make it look like a 3D like a view from top.

subplot(2,1,1); x = linspace(0,10); y1 = sin(x); plot(x,y1) subplot(2,1,2); y2 = sin(5*x); plot(x,y2) How to to make t...

1 year ago | 1 answer | 0

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answerQuestion

Plot one row of x with multi rows of Y

I have something like this values 25 is the X and remaing four values after that consitutes Y ..similarly for 50,100 ..250etc.....

1 year ago | 2 answers | 0

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answersHow to understand mean absolute error percentage?

MAPE= mean((abs(ye-Yv))./Yv) Yv=Real values vector ye=Neural Network model's estimated values

1 year ago | 0

Question

How to smoothen the signal and make a good envelope

I have a velocity and time data.I would like to smoothen the signal as the hilbert of the signal is very dense ? How to do it ...

1 year ago | 1 answer | 0

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answerQuestion

How to cut the signal at particular time or tol value ??

I have a signal and respective time ,how shall I cut it at a certain more or less close to tol value/time vector value. How to ...

2 years ago | 1 answer | 0

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answerHow can I select multiple points using the Data Cursor while the 'DisplayStyle' is either 'off' or 'window'?

Use Shift + Data cursor and select the figure made with coords.

2 years ago | 0

Question

How can I set a descend order finding peaks to my graph ?

I have a graph that takes the values from first maximum peak point and plots it.Now,how shall i introduce a threshold or descend...

2 years ago | 1 answer | 0

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answerQuestion

Dimensions of arrays being concatenated are not consistent.

Here all the variable are of 1X3 except velocity which is 1X2 So,how shall I add even that value in the sheet ? as I get Dim...

2 years ago | 1 answer | 0

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answerQuestion

To RESHAPE the number of elements must not change.

rows = 450; cols = 450; samples = 1024; samples = size(data2d,2); Data = reshape(data2d,cols,rows,samples); Da...

2 years ago | 1 answer | 0

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answerQuestion

How to use hanning window to get 5 cyles of sine waves?

load('x.mat') t=0:10*pi; % 5 cyeles sf=200e3; %frequency sinewave = sin(2*pi*sf*x); % gen continuous sine waves w = hanning...

2 years ago | 1 answer | 0

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answerQuestion

How to add Hann 5 cycles to the sine wave plot?

I would like to know how to add cycle to the sine plots? The below one is a sine plot continuous how to make it short for only ...

2 years ago | 1 answer | 0

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answerQuestion

How to remove particular value from matrix?

I have 2*104 matrices ,I'm interested to remove all values below a particular value say 2.5E-4 from row 2?

2 years ago | 0 answers | 0

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answersQuestion

Create a line of particular length and orientation

I found a code which creates line in arbitrary space and e verywhere,I couldn't control it's position as randi is used. Let's s...

2 years ago | 1 answer | 0

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answerQuestion

I'm trying to find the RMSD of the numbers by taking 1-2,2-3,3-4 in a sequence ,how can i loop as such ??

I'm right now doing as such,how to form a loop by taking in the previous nos? N = [ 55378 55344 55310 55276 55242 55208]; a = ...

2 years ago | 2 answers | 0

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answersQuestion

Why the increment of plot not working ?

I don;t know where the error is as instead of 6 figures I get 36 figures as its a 2 for loops ,how to combine these 2 varying fo...

2 years ago | 1 answer | 0

### 1

answerQuestion

second largest peak value

I'm getting the amp of second largest peak as correct but the time is wrong ? How to obtain the second highest value X,Y from t...

2 years ago | 2 answers | 0

### 2

answersQuestion

Findpeaks loop value not saving separately

I'm using findpeaks and trying to save the AMP values separately.But my loop is saving only the last value even though it runs i...

2 years ago | 1 answer | 0

### 1

answerQuestion

Value of a variable not changing in the workspace ??

The value of j goes upto 1025 but i stays at 255 itself ,what's the error in this nested loop?? X = load('x.mat'); Y = load('...

2 years ago | 1 answer | 0