# Roshni Garnayak

### MathWorks

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I am an Application Support Engineer at MathWorks India Pvt Ltd. My domains of interest are Signal Processing and Communication Systems.

DISCLAIMER: The advice and opinions I post are solely my own and do not reflect the Mathworks organization in any way.

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**Feeds**

Error while uninstalling or re-installing

If the MATLAB uninstaller was unable to complete, try executing the uninstall.exe from $MATLAB\uninstall (where $MATLAB is the f...

ungefär 4 år ago | 0

Fail to install R2019b update 4. After the failure I cannot start MATLAB due to libmwfl.dll and icuio61.dll missing.

If the MATLAB uninstaller was unable to complete, try executing the uninstall.exe from $MATLAB\uninstall (where $MATLAB is the f...

ungefär 4 år ago | 1

Verbosity argument issue with Simulink external mode

Follow these steps to resolve the error: 1. Go to configuration parameters -> Code Generation -> Real-time Windows Target 2. ...

ungefär 4 år ago | 0

What does this mean Requested 313121x313121 (730.5GB) array exceeds maximum array size preference.

This issue could be due to RAM limitations. Try the following suggestions: 1. Go to MATLAB > Preferences > Workspace and ensu...

ungefär 4 år ago | 0

Problems with entering a angle on matlab

While computing b in your code, you have not considered the phase angles. So to obtain the desired results you can refer to the ...

ungefär 4 år ago | 0

Simscape add-on installation error

To contact Technical Support, use the following link: https://www.mathworks.com/support/contact_us/

ungefär 4 år ago | 0

Not able to install Arduino support package in matlab 2019a

Sometimes support packages become corrupt and cannot complete installation or encounter errors that you cannot get past. In thes...

ungefär 4 år ago | 0

How do I make two waves move simultaneously towards each other to see the change in amplitude?

You can use the 'pause' and 'hold' functions to create a dynamic plot. Refer to the following code to get an idea: x = 1:1000; ...

ungefär 4 år ago | 1

How can I disable the background grid of a text box inside the graph in matlab R2019b?.

The default background color of the textbox is set to 'none' which renders it transparent. You can remove the gridlines by chang...

ungefär 4 år ago | 2

| accepted

How to initialize constants for a Simulink model from a MATLAB script?

You can use the callbacks available in the Model Properties for initializing constants. The callbacksthat you can use depending ...

ungefär 4 år ago | 1

How to change color model of all pictures in image datastore?

Instead of using ‘transformFcn’, you can use the ‘ReadFcn’ parameter in the ImageDatastore object. You can define the colour spa...

ungefär 4 år ago | 0

Plotting for a wide range of values and Log-Log Scale

If you attempt to plot the data using ‘loglog’ with ‘hold on’ enabled, the data plots as a linear plot. You can store the ‘Diffe...

mer än 4 år ago | 0

why is it takes so much to calculate this function ?

You can use the MATLAB Profiler to check which part of the code is consuming more time to run. Once you figure that out, you can...

mer än 4 år ago | 0

Training-progress Plots not supported for compiled EXE?

To check if the code is run in the MATLAB mode or deployed mode, use ‘isdeployed’ function. Refer to the following link to know ...

mer än 4 år ago | 0

| accepted

navigation and map format in mapping toolbox

You can use the ‘geoshow’ function to display the world map. Refer to the following link to get to know about the ‘geoshow’ func...

mer än 4 år ago | 0

compare files stopped working after upgrading to Catalina

Try increasing the Java Heap memory. The error might be occurring due to not enough memory. To increase the Java heap memory, r...

mer än 4 år ago | 0

How would you make a contour plot of an xls 3 columns Matrix?

You can load the data from the excel file to the MATLAB workspace by using the ‘readmatrix’ or ‘xlsread’ functions. You can us...

mer än 4 år ago | 0

replacing zeros with one and storing it in matlab

Let the zero matrix be A and the row number is assigned to a variable x. Then the following piece of code can help you convert t...

mer än 4 år ago | 0

Filling an excel spreadsheet as I am calculating values simultaneously?

You can refer to the following link for writing data to Excel Spreadsheets:https://www.mathworks.com/help/matlab/import_export/e...

mer än 4 år ago | 0

Image Labeler does not export previously saved data.

This issue has been resolved in MATLAB R2020a.

mer än 4 år ago | 0

Computing 1024 FFT from noisy ecg

You can refer to the following link to get examples on how to remove noise from ECG signals. https://www.mathworks.com/help/dsp...

mer än 4 år ago | 0

How to remove a value from matrix with same values in different positon?

You can obtain the indices of the first occurrence of each value in a matrix using the ‘unique’ function. Refer to the following...

mer än 4 år ago | 0

| accepted

Simultanously plotting on two figures

You can specify two different handles for the two axes and while plotting specify the handle of the axis you want to plot on. Th...

mer än 4 år ago | 0

MATLAB sgtitle overlapping with the title of the subplots

You can change the position of the subplots to make the subplot grid title (defined by ‘sgtitle’) visible. To do this, use the f...

mer än 4 år ago | 0

ber vs snr ofdm using fft and ifft

Refer to the following link for examples and workflows for plotting bit error rate with respect to signal-to-noise ratio: https...

mer än 4 år ago | 0

Power spectrum of audio signal

To import the audio file into MATLAB workspace, use the ‘audioread’ function. Refer to the link below to get the details of ‘aud...

mer än 4 år ago | 0

NOISE REMOVAL IN EMG SIGNAL

A simple filtering noise removal technique for EMG signals is to attenuate some high-frequency and low-frequency noises using di...

mer än 4 år ago | 0

| accepted

How do I plot symbol error rate against signal to noise ratio for m-ary pam modulation in matlab?

Refer to the following link for examples and workflows for plotting symbol error rate with respect to signal-to-noise ratio: ht...

mer än 4 år ago | 0

Custom Argument Validation Function for NameValueArgs

Try using ‘varargin’ in place of ‘NameValueArgs’. To validate the properties and assign values to them, use the ‘set’ method. ...

mer än 4 år ago | 0

Stacked bar plot not working correctly

It was a bug. The issue has been resolved in MATLAB R2019b.

mer än 4 år ago | 0