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# Teshan Rezel

Last seen: 3 days ago Active since 2019

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Question

Issue with locating end of poorly defined peak
Hi folks, I have several graphs that look similar to the one attached. I am trying to formalise a general approach to finding t...

7 days ago | 1 answer | 0

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Question

Is it possible to erode only the outermost layer of a circle?
Hi folks, I am looking to erode a circle from the outside in, layer by layer. So far, I have tried to use the following: x =...

26 days ago | 3 answers | 0

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Question

problem with videoWriter not closing (2)
Hi folks, This is a followup to my original question, found here! I am creating a video and having trouble with the videoWrit...

3 months ago | 1 answer | 0

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Question

problem with videoWriter not closing
Hi folks, I am creating a video and having trouble with the videoWriter not closing, or taking a very long time to close. May...

3 months ago | 1 answer | 0

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Question

How to make one video out of 3 images?
Hi folks, I'm trying to create a single image out of 3 different images, then collate the subsequent images into a video. I'm a...

4 months ago | 1 answer | 0

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Question

problem with creating video from black and white images
Hi folks, I am trying to create a video using Black and White images using the following code: writerObj = VideoWriter(threshV...

4 months ago | 3 answers | 0

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Question

Is it possible to train a model to recognise the object in this video?
Link to video Hi folks, I've tried using various image processing techniques on the images used to make this video, to try and...

5 months ago | 1 answer | 0

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Question

help with deleting zeros from an array
Hi folks, I am trying to use polyfit and polyval to get the line of best fit across two sets of data, but am getting a very wie...

5 months ago | 1 answer | 0

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Question

Help with linear regression
Hi folks, I have 2 tables. A is 256x54 and B is 1x54. I want to correlate each of the 256 values in each column of table A to...

5 months ago | 0 answers | 0

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Question

finding the start and end points of a unimodal peak
Hi folks, I am trying to automate the finding of the start and end of a peak. Many of the peaks I am looking at are gaussian. H...

5 months ago | 2 answers | 0

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Question

Is there a way to extract the numeric data from these chars?
Hi folks, I have a cell of times (attached), which I need to read as numbers. Is there any way to do this? Using num2str() doe...

5 months ago | 2 answers | 0

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Question

Help with linear optimisation problem
Hi folks, I'm looking to conduct a linear optimisation and was hoping for some help on the matter. I have 56 columns of data...

5 months ago | 1 answer | 0

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Question

Is there a way to convert times in this format to double, so I can perform mathematical operations on them?
Hi folks, I have an array of times that looks like this: [1059, 1100, 1101...] where 1059 = 59 minutes past 10am. I need to w...

5 months ago | 2 answers | 0

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Question

Is it possible to rectify the figure such that the zig-zag effect doesn't occur?
Hi folks, I have a series of graphs as per below. With all of them, they appear to have this "wonky" tail and I'm not sure wha...

5 months ago | 1 answer | 0

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Question

Is there a way to segment this image into 3 parts, even though the colours are so similar?
Hi folks, I am trying to segment the following image of a seed. The points of interest look very similar in RGB, HSV, LAB and YC...

7 months ago | 1 answer | 0

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Question

Deleting certain elements from an array without looping
Hi folks, I have a cell array containing all the file names in a subfolder. I want to remove the filenames that are not 21 char...

8 months ago | 2 answers | 0

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Question

renaming a variable, or creating a dynamic variable name
Hi folks, I read on here that creating dynamic variable names is bad programming practice, so was hoping to get some help with...

8 months ago | 2 answers | 0

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Question

Is there a way to overlay a graph onto a video, plotting each successive point with each frame?
Reposted since the previous post didn't get resolved! Hi folks, I have a script that creates a video from image files, as be...

9 months ago | 2 answers | 0

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Question

Is there a way to overlay a graph onto a video, plotting each successive point with each frame?
Hi folks, I have a script that creates a video from image files, as below: for i = 1 : numFolders RawImages = [vidFolders...

9 months ago | 2 answers | 0

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Question

help with reading txt file into matlab
hi folks, I have a very large txt file that I want to read into Matlab. When I use the "import data" option it reads the file j...

10 months ago | 1 answer | 0

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Question

Help with extracting data from excel
Hi folks, I'm trying to extract data from excel files in a specific way. Essentially, I want to loop through each file, get t...

10 months ago | 1 answer | 0

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Question

Help with syntax for a self-made function
Hi folks, I have the following function defined in Matlab but am getting an error when running. The error and the code are belo...

11 months ago | 1 answer | 0

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Question

Is there a way to overlay one mask onto another?
I have two masks, as below. I want to make sure that the white area of the second mask is not more than the white in the first. ...

11 months ago | 1 answer | 0

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Question

Is there a way to threshold the background out of the image, to leave only the object?
Hi folks, I have images that look like the following, and I'm trying to threshold out the background. For some images, this is ...

11 months ago | 1 answer | 0

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Question

App designer - Automatically scale app to the size of the screen it is used on
Hi folks, I have an app where the components are scaled appropriately for my screen, but not for others of a different (smalle...

11 months ago | 1 answer | 0

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Question

problem with polyval plotting
Hi folks, I am trying to plot a trendline on a scattergraph but I'm not sure why the following is happening! Any help will be a...

12 months ago | 1 answer | 0

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Question

Plotting data with 5 dimensions
Hi folks, I have a dataset that has data points each with a name and 4 elements. However, of these elements are percentages t...

12 months ago | 1 answer | 0

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Question

VERTCAT error when trying to populate array
Hi folks, I am trying to write some fata into an array, which I will then write to excel. I get the VERTCAT error when trying t...

12 months ago | 1 answer | 0

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Question

Problem writing histogram data to excel - non-English characters and mismatched columns
Hi folks, I am trying to write image histogram data to excel, for various images. However, I am running into a problem where t...

12 months ago | 1 answer | 0