用于NPP（净初级生产）百分比变化的Python脚本

您能为百分比变化光栅从“开始年”（Inras1）到“结束年”（Inras2）的植被净初级生产光栅提供一个python脚本吗？示例：这是一个给定的光栅单元，与“开始年份”相比增加了25%

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请出示一些研究的证据以及您迄今为止所做的尝试。

 # Name: Minus_Ex_02.py
 # Description: Modification of ESRI's Subtracts the value of the second                      input raster from the Value of the first input raster on a cell-by-cell basis
  # Requirements: Spatial Analyst Extension
  # Author: ESRI

  # Import system modules
  import arcpy
  from arcpy import env
  from arcpy.sa import *

  # Set environment settings
  env.workspace = "C:/Users/Kaleab/Desktop/MOD17A3/Mosaic/Clip"

  # Set local variables
  inRaster1 = "2000clip.tif"
  inRaster2 = "2010clip.tif"

  # Check out the ArcGIS Spatial Analyst extension license
  arcpy.CheckOutExtension("Spatial")

 # Execute Minus
 outMinus = Minus(inRaster1, inRaster2)
 changeras = outMinus/inRaster1
 # Save the output 
 changeras.save("C:/Users/Kaleab/Desktop/MOD17A3/Mosaic/Clip/Change.tif")