MATLAB Answers

dividing value by 100

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wael elsisi
wael elsisi on 18 Jul 2021
Commented: Image Analyst on 25 Jul 2021
I want to divide my data by 100
How to do it in MATLAB Analysis ?
data = thingSpeakRead(readChannelID, 'ReadKey', readAPIKey);
data = thingSpeakRead(readChannelID, 'ReadKey', readAPIKey)/100;
should I use write part ?
thingSpeakWrite(writeChannelID, analyzedData, 'WriteKey', writeAPIKey);
  1 Comment
Image Analyst
Image Analyst on 18 Jul 2021
How about
data = data / 100;

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Answers (3)

wael elsisi
wael elsisi on 18 Jul 2021
Edited: Image Analyst on 18 Jul 2021
Thank you for your support.
I have tried your way but I got wired data.
send_windSpeed = thingSpeakRead(readChannelID, 'ReadKey', readAPIKey);
send_windSpeed = send_windSpeed/100;
  1 Comment
Image Analyst
Image Analyst on 18 Jul 2021
What do you mean by "wired data"? Did it, or did it not, divide your send_windSpeed values by 100?

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wael elsisi
wael elsisi on 18 Jul 2021
instead of getting float data I've got Integer value.
I have multiplay the value by 100.
Then I have asigned the result to high and low byte.
Then send data to thingspeak.
now I want to get the data on thingspeak.
I use Sigfox.
  1 Comment
John D'Errico
John D'Errico on 18 Jul 2021
Please don't use an answer to make a comment.

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Image Analyst
Image Analyst on 18 Jul 2021
Edited: Image Analyst on 18 Jul 2021
To divide by 100, how about
send_windSpeed = send_windSpeed / 100;
You said you're getting integers. So, in your code
send_windSpeed = thingSpeakRead(readChannelID, 'ReadKey', readAPIKey);
send_windSpeed = send_windSpeed/100;
is send_windSpeed integer or floating point after the first line of code where you call thingSpeakRead()? The second line should not change it from floating point to integer.
To multiply by 100, you simply use * instead of /, like this:
send_windSpeed = send_windSpeed * 100;
Please reply as a comment to this (my) answer, not as a brand new answer to your original question.
  24 Comments
Image Analyst
Image Analyst on 25 Jul 2021
Did you replot the data after it was divided by 100? Just dividing the array won't do a replot automatically. That is a separate step you must do explicitly.

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