substract,subtraction

2,substract subtracting reference data 减去参考数列 analysis
点住鼠标左键不放一直拖到合适的位置):如图5,然后选择substract得到6
image processing summarization
【中商海外直订】color by numbers addition & substractio.
() -- substract 1 from availablcount that is the number of