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Kcire L


Last seen: 1 year ago |  Active since 2021

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Problem finding "valleys" in signal
Hello, I am using the findpeaks function to find the valleys in a signal, but it is not consistent and was wondering if there w...

1 year ago | 3 answers | 0

3

answers

Answered
text in subplot with large font
Thanks for that answer. One thing, however, I am updating this supblot periodically and need to clear the respiratory rate for ...

2 years ago | 0

Question


text in subplot with large font
Hello, I'm trying to add text in a subplot instead of a chart that displays respiratory rate. I am using the code below, how...

2 years ago | 1 answer | 0

1

answer

Question


Output variables of different Class to csv or xls file.
Hello I have a few variables that I would like to output to a .csv or .xls file but am having difficulty accomplishing this. T...

2 years ago | 1 answer | 0

1

answer

Question


Findpeaks based on signal frequency
Hello, I am trying to use findpeaks on a signal that has a specific frequency component. This signal is repiratory audio, and ...

2 years ago | 0 answers | 0

0

answers

Question


Get column E based on transition in Column I
Hello, I have imported a spreadsheet into Matlab and am trying to look at where column I transitions from a 1 to a 0. When tha...

2 years ago | 1 answer | 0

1

answer

Question


extract a section of a vector and plot
This is most likely a very trivial question but I am having difficulty getting the outcome I would like. I have created a time ...

2 years ago | 1 answer | 0

1

answer

Answered
Detect signal clipping and remove
I'd like the areas highlighted in red to be removed (or zeroed out) but without altering the time domain. I am not able to use ...

3 years ago | 0

Question


Detect signal clipping and remove
Hi, I have a signal from a microphone that is listening for respiratory audio. When the test subject talks or moves too much, ...

3 years ago | 3 answers | 0

3

answers

Question


Evaluating multiple MEMS microphones
Hello, I need to evaluate multiple MEMS microphones to weed out which one is the best for my application. I am looking for som...

3 years ago | 0 answers | 0

0

answers

Question


Looking for a Low Pass Filter ( < 100 Hz) that will work in Octave
Hello, I am looking for a low pass filter with a cutoff of 100Hz that will work in Octave. I have used the butter function, bu...

3 years ago | 1 answer | 0

1

answer

Answered
Amplitude increase after filter
and how is this applied to the raw siganl? filtfilt(sos, g, raw)?

3 years ago | 0

Answered
Amplitude increase after filter
I appreciate your assistance.. Unfortunately I don't have access to MATLAB until late next week and am currently using GNU Octav...

3 years ago | 0

Question


Find beginning and end points from a pulse
Hello, I am trying to determine the beginning and end points of a pulse like the plot below. I have seven of these pulses save...

3 years ago | 1 answer | 0

1

answer

Answered
Amplitude increase after filter
It isn't amplifying anymore but it is now reduced reduced amplitude. You say it shouldn't be off at all, but doesn't a filter ...

3 years ago | 0

Answered
Amplitude increase after filter
Now it is off by about a factor of 10, but is it safe to assume that is the normal reduction from the filtering? step4 = filtfi...

3 years ago | 0

Question


Amplitude increase after filter
Hello, I am using a moving average to filter and find the envelope of a raw signal. I am curious as to why the amplitude of th...

3 years ago | 5 answers | 0

5

answers

Question


Text output from script
Hello, I was wondering if there was a way to output a text report of certain values and variables from my matlab script. I am ...

3 years ago | 1 answer | 0

1

answer

Question


Label point on FFT plot
Hi, I have a plot of an FFT of a signal, I did a findpeak to find the pronounced frequencies, and now I would like to add a lab...

3 years ago | 1 answer | 0

1

answer

Question


Use findpeaks on specific frequency range
Hello, I am trying to find the two peaks just under 1Hz in the plot attached. I wasn't sure how to use findpeaks to do this, b...

3 years ago | 1 answer | 0

1

answer

Question


Automate pulse duration measurements
Hi, I need to find the beggining and end of pulses like the image attached. With those points, I'd like to find the duration o...

3 years ago | 0 answers | 0

0

answers

Question


Estimate volume from extracted pulse
Hello, I have extracted a pulse from an audio signal and would like to see if I can determine volume from each pulse. Does any...

3 years ago | 1 answer | 0

1

answer