Community Profile # Pappu Murthy

##### Last seen: 2 months ago
42 total contributions since 2014

Professional Interests: signal processing

View details...

Contributions in
View by

Question

Mixed data types in a Table
I have an app developed using app Designer. I have a table with 5 rows and 3 columns. These are usually double type and my numb...

4 months ago | 1 answer | 0

### 1

Question

How to eliminate Repeated NaNs in a array?
I have two vectors X, and Y; both will have NaNs present in them. If X has a NaN, Y will have a NaN as well at the same locatio...

11 months ago | 1 answer | 0

### 1

Question

How to use format spec to read in Textscan?
I have a string '-2.554-4'. This when I read using textscan I get two numbers -2.554 and -4. However it should be actually -2.55...

1 year ago | 1 answer | 0

### 1

Question

tooltip in App Designer
In my App designer for one of the panels I defined a tooltip. Now I want to get rid of it. Everytime i highlight and get rid of ...

2 years ago | 2 answers | 0

### 2

Question

Button Pressed Behavior control in App Designer.
I created static text area with some text in an App using App Designer. I created a button when pressed makes the visibility of ...

2 years ago | 2 answers | 0

### 2

Question

subplots in App Designer.
I am developing a GUI which has two Axes, UIAxes2, and UIAxes. UIAxes2 has single plot and it works fine. But UIAxes, should hav...

2 years ago | 1 answer | 1

### 1

Question

I have a question on usage for fft to get fourier series back.
My problem is f = 1 + 2*sin(2.*pi*t/L) + 3.*sin(4*pi*t/L); L = 1, and I am dividing the peiod to 100 steps. Here i...

2 years ago | 1 answer | 0

### 1

Question

Question on usage of fft
I have a function F(t) = 1 + 2*sin(pi*t/180); So it has one harmonic. If I do TestFFT = fft(F(t),5); % Asking for 5 ...

2 years ago | 1 answer | 0

### 1

Question

I have a binary file data which I am trying to read. the first data of record is 8 integer numbers. They are precision "int" wh...

2 years ago | 1 answer | 0

### 1

Question

Neural Net Inputs.
My input is actually a series of 1's and 2's very long like 1600. I need to somehow reduce this to a manageable size, since if I...

2 years ago | 0 answers | 0

### 0

Question

runs of 1s and 2s in a long vector
i have a long vector which has a whole bunch of 1s and 2s.. I need to find how many such strings of 1s and 2s are there. Is ther...

2 years ago | 1 answer | 0

### 1

Question

Feed forward neural net using trainbr
when I use the alogorithm trainlm i get 4 subplots when I do "plotregression". However when I use trainbr alogorithm, i see only...

2 years ago | 0 answers | 0

### 0

Question

Errors using functions like initp
Just downloaded some neural nets example files. I get errors like "initp" function not found etc. Is that supposed to be a par...

2 years ago | 0 answers | 0

### 0

Question

simple neural net question.
I have 1000 data sets. Inputs contain 8 variables. and there are 6 responses of which 4 are important to me. What I am wondering...

2 years ago | 0 answers | 0

### 0

Question

Matrix number of rows reduction to a smaller number of rows.
I have a matrix for example Nrow, by 6 let us say. The first column has numbers 1 thru n which is less than Nrow.. so some rows ...

2 years ago | 1 answer | 0

### 1

Question

Print Table to a File.
I have this code VarNames={'Col1', 'Col2'}; RowNames={'Row1', 'Row2'}; A = [1 2;3 5]; Ta = array2table(A,'Variable...

2 years ago | 1 answer | 0

### 1

Question

How do I initialize an array of unknown dimension?
I have a vector whose length is not known apriori. The programs gives a warning with red wiggles underneath indicating that the ...

2 years ago | 1 answer | 0

### 1

Question

Matlab floating point precision.
My question pertains to matlab precision. I encountered this problem I have a long time series of 549354 record. and I am looki...

2 years ago | 1 answer | 0

### 1

Question

how to print E formated numbers.
I have numbers such as 0.1032E-02 (say) If I read this as x = 0.1032E-02 and save it to a text file using fopen, and fprintf f...

2 years ago | 1 answer | 0

### 1

Annotating an Arrow with in a plot.
the link helped me solve the problem partially. When I click on maximize the window with plot tools, all the arrow positions ar...

2 years ago | 0

Question

Annotating an Arrow with in a plot.
I am trying to use the annotation function to show an arrow on my plot like ar = annotation('arrow'..) I know the location wher...

2 years ago | 3 answers | 0

### 3

Question

Where to find the image packages of folder so that we can try some transfer learning NEURAL NET.
I have gone through the video, transfer nets in 10 lines of code. I wanted to try but the images and the folders that were used...

2 years ago | 1 answer | 0

### 1

Question

my excel file has 61 columns and 180,000 rows or so. It is taking forever to read it. i am using Readtable with appropriate rang...

2 years ago | 1 answer | 0

### 1

Question

Where can I find the data used for Deeplearning training course, specially the flowers data
I have gone through the course Deep Learning. Now I like to import some of the data that was used during the training. Specially...

2 years ago | 1 answer | 0

### 1

Question

question on tabbed plots.
i have three tabs in my figure... something like H1 = uitab(tgp,'Title','Micrograph'); H2 = uitab(tgp,'Title','Histograms')...

3 years ago | 1 answer | 0

### 1

Question

vectorizing solution using fzero
i have equations of the form f(x,X)=0; where X is a column vector of size N. i can solve using for example ...

3 years ago | 2 answers | 0

### 2

Question

Clean solution to shrink matrices
I have pre-allocated a large Matrix X = (80000,8). for e.g zeros(80000,8); This I did for speed. After several operations I onl...

3 years ago | 2 answers | 0

### 2

Question

Subplots within a GUI figure
I am developing a GUI using GUIDE. I have three axes defined in GUI. two of them I filled with two plots. The third axes, howeve...

3 years ago | 2 answers | 0

### 2

Question

Using Stop button in GUI and Optimization
I developed a GUI and I have included a Stop button and its callback I have declared a global variable "StopOptim" and gave it a...

3 years ago | 1 answer | 0

### 1

Question

how chose a number with unequal probability?
My question is if I use randi function and say between 1 : 100, it chooses randomly a number giving equal probability to all num...

3 years ago | 2 answers | 0