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# Nina Perf

Last seen: 2 months ago Active since 2021

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Question

Bode diagram for a Butterworth filter
Hi, I want help in doing a Bode diagram for a 8th order Butterworth passband with passband between 2 and 12 Hz. Sampling freque...

4 months ago | 2 answers | 0

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Question

Help Merge two tables by the column variables
Hi, I have the following table tComplete, where there are 50 different Birds, 2 Days (P and O), different Tries, and 200 Featur...

6 months ago | 1 answer | 0

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Question

Help iteration for loop and tables vertcat
Hi, I have a varible C which is a 45x2 double with the possible combinations of numbers, #, from 1 to 10 (meaning 10 birds). P...

6 months ago | 2 answers | 0

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Question

Help with Table and Row indexing
Hi, I have the following table Predictions, where there are 2 Days, 2 different Time points, for 2 different Birds, 3 Tries per...

7 months ago | 1 answer | 0

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Question

Help with table variables calculation
Hi, I have a table 'T' with a column variable named 'rank', which includes categorical numbers: from 1 to 3. I want to che...

7 months ago | 1 answer | 0

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Question

Help calculating values from a table into a loop
Hi, I have the following table T, where there are 2 different timepoints, for 2 different birds, 3 trials per day. I want to c...

7 months ago | 1 answer | 0

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Question

Histogram occurences per class
Hi, I want to have the classes count centered at the top of each bar, as a number. Can you please help? figure() h = histogra...

8 months ago | 1 answer | 0

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Question

Problem with Cell Array in Table
Hi, I have a table T, with cell arrays of doubles. By opening T.Var1{1,1} (selected in the figure above) we get a double with ...

9 months ago | 1 answer | 0

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Question

Find consecutive ones and save the contents
Hi, indcol1 = ind(:,1); % the indexes indcol2 = ind(:,2); % the array of 1 and 0 Thank you in advance!

9 months ago | 2 answers | 0

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Question

Help Segmenting signal processing
Hi, I have data. I have segmented the signal in windows and calculated rms. Can you please help in finding multiple minimum val...

9 months ago | 3 answers | 0

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Question

Histogram wrong Classes help
Hi, I need help representing data with the histogram function. figure() for i = 1:8 subplot(4,2,i), histogram(Data.score...

10 months ago | 1 answer | 0

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Question

Feature Selection using Correlation-based method
Hi, I want to use the Correlation-based Feature Selection to perform feature selection. I tried the https://www.mathworks.com/...

12 months ago | 1 answer | 0

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Question

Help normalizing data in table
Hi, I have a 100x6 Table with 6 variables. I want to center the data so that it has mean 0 and standard deviation 1, using th...

1 year ago | 1 answer | 0

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Question

Conditions else if - efficiency advice
Hi, I want advice on how to make this code more efficient. We have2 groups S and T. For each I want to attribute the aS or a...

1 year ago | 1 answer | 0

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Question

Convert x axis to seconds
Hi, I need help converting the last 2 plots (plot 2 and plot 3) x axis, to the time domain in seconds, given a data signal with...

1 year ago | 1 answer | 0

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Question

Extracting data cell that match specific strings in different columns
Hello! I have a table, T, with the following variable names: Type, Ta, Sub, Day, Try, Data I ask the person for these differe...

1 year ago | 1 answer | 0

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Question

FFT plot in frequency domain, error help
Hi, I did a myfft function in order to plot the (PSD,f) of a signal: 10696x1 double [f, ~, ~, psd, ~] = myfft(Data, fs);...

1 year ago | 1 answer | 0

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Question

Converting values to g
Hello, I need help converting values of an Accelerometer sensor. It has 12gb so the values are from 0 to 4096. I need to con...

1 year ago | 1 answer | 0

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Question

Units help to plot
I want to convert values in a table column to a range of -1 to 1 units. My -1 value is -800 My 0 value is 300 My 1 value i...

1 year ago | 1 answer | 0

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Question

Convert units to g
Converting to g

1 year ago | 1 answer | 0

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Question

Feature Selection using ReliefF function
Hello, I am using the ReliefF feature selection in around 700 features (1 table column is one feature). I am getting an error t...

1 year ago | 0 answers | 0

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Question

Histogram occurences per age problem
Hello, I have a table with persons data. I have the ages in one column and I wanted to do an histogram like the one bellow. Ho...

1 year ago | 1 answer | 0

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Question

Using barh to plot top 10 values in Feature Selection
Hello, I did Feature Selection of 700 features. I want to bar plot only the top 5 (with highest predictor rank). Can you pl...

1 year ago | 1 answer | 0

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Question

Error Concatenating multiple tables
I need to concatenate multiple tables vertically. All tables have the same Variable Names in the columns and they have the same ...

1 year ago | 1 answer | 0