I am using Prophet on a timeseries with exogenous features.

I am using Prophet on a timeseries with exogenous features.

I am forecasting somes sales volume data.
My question is that, despite of my recent trend being of “low”, I CANNOT have negative sales (LOL), but my predictions are showing negative values!

I’m trying to install fbprophet for a simulation model on my system but keep getting the same error and am using command prompt for installation. I also have jupyter notebooks on my sytem. The error code alongwith the installation for the same is provided in the runtime code of the terminal below. Please ignore lines after this point as i’m trying to fulfill the word limit for uploading my question.The library is required for a weather simulation code that will be used at our sites of construction requiring smooth construction provess while improving the overall planning and mitigatig the effect of the incoming monsoon.

PS D:PycharmPycharm Saveds> pip install fbprophet
Collecting fbprophet
Using cached fbprophet-0.7.1.tar.gz (64 kB)
Preparing metadata (setup.py) … done
Requirement already satisfied: Cython>=0.22 in d:pycharmpycharm savedsvenvlibsite-packages (from fbprophet) (3.0.10)
Collecting cmdstanpy==0.9.5 (from fbprophet)
Using cached cmdstanpy-0.9.5-py3-none-any.whl.metadata (2.9 kB)
Requirement already satisfied: pystan>=2.14 in d:pycharmpycharm savedsvenvlibsite-packages (from fbprophet) (2.19.1.1)
Requirement already satisfied: numpy>=1.15.4 in d:pycharmpycharm savedsvenvlibsite-packages (from fbprophet) (1.24.4)
Requirement already satisfied: pandas>=1.0.4 in d:pycharmpycharm savedsvenvlibsite-packages (from fbprophet) (2.0.2)
Requirement already satisfied: matplotlib>=2.0.0 in d:pycharmpycharm savedsvenvlibsite-packages (from fbprophet) (3.8.4)
Requirement already satisfied: LunarCalendar>=0.0.9 in d:pycharmpycharm savedsvenvlibsite-packages (from fbprophet) (0.0.9)
Requirement already satisfied: convertdate>=2.1.2 in d:pycharmpycharm savedsvenvlibsite-packages (from fbprophet) (2.4.0)
Requirement already satisfied: holidays>=0.10.2 in d:pycharmpycharm savedsvenvlibsite-packages (from fbprophet) (0.48)
Collecting setuptools-git>=1.2 (from fbprophet)
Using cached setuptools_git-1.2-py2.py3-none-any.whl.metadata (5.8 kB)
Requirement already satisfied: python-dateutil>=2.8.0 in d:pycharmpycharm savedsvenvlibsite-packages (from fbprophet) (2.8.2)
Requirement already satisfied: tqdm>=4.36.1 in d:pycharmpycharm savedsvenvlibsite-packages (from fbprophet) (4.65.0)
Requirement already satisfied: pymeeus<=1,>=0.3.13 in d:pycharmpycharm savedsvenvlibsite-packages (from convertdate>=2.1.2->fbprophet) (0.5.12)
Requirement already satisfied: ephem>=3.7.5.3 in d:pycharmpycharm savedsvenvlibsite-packages (from LunarCalendar>=0.0.9->fbprophet) (4.1.5)
Requirement already satisfied: pytz in d:pycharmpycharm savedsvenvlibsite-packages (from LunarCalendar>=0.0.9->fbprophet) (2023.3)
Requirement already satisfied: contourpy>=1.0.1 in d:pycharmpycharm savedsvenvlibsite-packages (from matplotlib>=2.0.0->fbprophet) (1.2.1)
Requirement already satisfied: cycler>=0.10 in d:pycharmpycharm savedsvenvlibsite-packages (from matplotlib>=2.0.0->fbprophet) (0.12.1)
Requirement already satisfied: fonttools>=4.22.0 in d:pycharmpycharm savedsvenvlibsite-packages (from matplotlib>=2.0.0->fbprophet) (4.51.0)
Requirement already satisfied: kiwisolver>=1.3.1 in d:pycharmpycharm savedsvenvlibsite-packages (from matplotlib>=2.0.0->fbprophet) (1.4.5)
Requirement already satisfied: packaging>=20.0 in d:pycharmpycharm savedsvenvlibsite-packages (from matplotlib>=2.0.0->fbprophet) (24.0)
Requirement already satisfied: pillow>=8 in d:pycharmpycharm savedsvenvlibsite-packages (from matplotlib>=2.0.0->fbprophet) (9.5.0)
Requirement already satisfied: pyparsing>=2.3.1 in d:pycharmpycharm savedsvenvlibsite-packages (from matplotlib>=2.0.0->fbprophet) (3.1.2)
Requirement already satisfied: tzdata>=2022.1 in d:pycharmpycharm savedsvenvlibsite-packages (from pandas>=1.0.4->fbprophet) (2023.3)
Requirement already satisfied: six>=1.5 in d:pycharmpycharm savedsvenvlibsite-packages (from python-dateutil>=2.8.0->fbprophet) (1.16.0)
Requirement already satisfied: colorama in d:pycharmpycharm savedsvenvlibsite-packages (from tqdm>=4.36.1->fbprophet) (0.4.6)
Using cached cmdstanpy-0.9.5-py3-none-any.whl (37 kB)
Using cached setuptools_git-1.2-py2.py3-none-any.whl (10 kB)
Building wheels for collected packages: fbprophet
Building wheel for fbprophet (setup.py) … error
error: subprocess-exited-with-error

I’m trying to install Fbprophet in Anaconda and its packages to import it in jupyter using conda install -c conda-forge prophet, but it fails every time.