Trend line help and example

[vlturner]

I have an absolute pressure sensor and its working but I want to add a trend line and cant seem to get it working.

So the new key is PSI_TREND

Here is the forecast. I am running this on the Zabbix server

{PSI.forecast(1h,1d,12h)}

[vlturner]

IS THERE NO ONE THAT CAN ANSWER THIS?

[vlturner]

1089:20190130:121516.064 error reason for "Zabbix server:PSI_TREND" changed: Incorrect function expression: raspberrypi:PSI.forecast(1h,1d,5m,,avg)}
1089:20190130:121611.175 error reason for "Zabbix server:PSI_TREND" changed: Incorrect function expression: raspberrypi:PSI.forecast(1h,1d,5m,,avg)

Tried the following:
{raspberrypi:PSI.forecast(1h,1d,5m,,avg)}
and
raspberrypi:PSI.forecast(1h,1d,5m,,avg)

[DmitryL]

Here is the example

https://www.youtube.com/watch?v=_jUpiskJxMw&t

[vlturner]

Here is the line, watched the video, but the formula doesn't work like the documentation.

forecast(PSI,1h,exponential,1d)

cannot use avg in the 4th value or any of the others in the 3rd value.

Cannot evaluate expression: "Cannot evaluate function "forecast(1h,1d,exponential,1d)": invalid third parameter."

[DmitryL]

Try like this:
forecast(PSI,1h,,1d,exponential)

[vlturner]

Actual fix is as follows.

forecast(openweather.pressure,2h,,30m,linear,avg)