What does 'NumPoints' means? What does it do to the variable?

[pressure,time] = thingSpeakRead(readChId,'Fields',1,'NumPoints',100);

Hi everyone, I'm using this variable in a program code and I'd like to know what expression 'NumPoint' does to it. What I want to do is to read a signal now at timeline and another point a few minutes before the first one to calculate how much litters a machine is produzing tax production. How could I do that?

PS: This is the first time I'm using any kind of programming language

[Star Strider]

Please provide a link to the function you’ve quoted. That saves us the effort of searching for it.

Answer 1

[Walter Roberson]

It does what it says on the box ;-)

https://www.mathworks.com/help/thingspeak/thingspeakread.html#buzh9u6-NumPoints

"Number of data points to extract, specified as a comma-separated pair consisting of 'NumPoints' and a numeric value. The number of points or rows of data is counted from the time the command is issued. The ThingSpeak server limits the number of points returned to a maximum of 8000."