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Impala


Last seen: Today |  Active since 2018

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Do predictive variables need to be standardised before applying PCA in classification learner?
Hi, I have a feature table and I'm looking to apply PCA in classification learner. Do I need to first standardise my feature t...

7 months ago | 1 answer | 0

1

answer

Question


Change class labels of a confusion matrix that has been exported from Classification Learner
Hi, I have exported a confusion matrix from the classification learner app (using the Export plot to figure function), which...

7 months ago | 1 answer | 0

1

answer

Question


Applying a MRMR feature-selected ensemble model to new data
Hi, I initially trained an ensemble model using 66 features, which were extracted from my data. I then applied the MRMR feature...

1 year ago | 1 answer | 0

1

answer

Question


Applying a K-Fold cross validated model to predict the response variable for new data
Hi, I have trained a k-fold cross-validated model using the fitctree classification model. Here is my code: % Extract predict...

1 year ago | 2 answers | 0

2

answers

Question


Splitting table field with multiple rows into separate columns
Hi, I have a 459 x 1 table - each row of the table contains n rows of data by x 3 (see attached). Sort of like a nested field....

1 year ago | 2 answers | 0

2

answers

Question


Confusion chart displaying wrong number of class labels
Hi, I'm classifying accelerometer position data into 2 classes: movement or stable using a binary decision tree model. I've ap...

2 years ago | 1 answer | 0

1

answer

Question


Organising data for machine learning using buffer function
Hi, I have some accelerometer data for various activities (standing, sitting, walking, walking upstairs, walking downstairs, l...

4 years ago | 1 answer | 0

1

answer

Question


Understanding SNR matlab syntax
Hi, I'm trying to determine the SNR for a noisy set of data - my data is actually trajectory data (x, y, z) measuring motion. ...

4 years ago | 1 answer | 0

1

answer

Answered
Struct to numeric variable
Thank you all for your responses. new_var = [structname.fieldname]; didn't quite work. It basically puts all the data in row...

4 years ago | 0

Question


Struct to numeric variable
Hi, Sorry but this is a really simple question. I have a struct (3 fields and 446 elements) and I'm trying to access a a spe...

4 years ago | 4 answers | 0

4

answers

Question


Using the findchangepts function on data containing NaN datapoints
Hi, My data contains NaN datapoints, so when I use the findchangepts function, I get the following error message: xError usin...

4 years ago | 2 answers | 0

2

answers

Question


Distortion at end of signal after low pass filtering
Hi, I have created a low pass filter with the following properties to smooth out my signal: function Hd = lpfilt %LPFILT Ret...

5 years ago | 1 answer | 1

1

answer

Question


Representing signals in the frequency domain after adaptive filtering
Hi, I have a trajectory signal (represented in x, y and z plane) that is distorted by breathing (see attachednFigure 1 top and...

5 years ago | 0 answers | 0

0

answers

Question


Visualise 3D trajectory data as a volume plot
I have 3D trajectory data (x, y, z coordinates) which I would like to visualise as a volume plot. I'm using plot3 but just getti...

6 years ago | 1 answer | 1

1

answer