c语⾔rgb数值颜⾊渐变算法，颜⾊渐变算法
需求：
给定⼀组数据，给定渐变颜⾊两端的颜⾊值，需要根据这组数据中的每个值⼤⼩为其分配⼀个颜⾊
算法：
⼀个需要⽤颜⾊表⽰值⼤⼩的数据集weightlist，给定渐变的起始颜⾊ colorStart={"red":255,"green":50,"blue":47}，结束颜⾊colorend ={"red":139,"green":20,"blue":10},minNum=min(weightlist),maxNum=max(weightlist),weightlist中的⼀个值number，计算其对应的颜⾊值color
\[ \frac{number-minNum}{maxNum-minNum}=\frac{color-colorStart}{colorend -colorStart} \]
最终颜⾊值：
渐变颜代码大全
\[ color=\frac{(number-minNum)(colorend -colorStart)}{maxNum-minNum}+colorStart \]
将colorR，colorG，colorB分别代⼊计算
实现
def getColorstr(value): #将rgb颜⾊转换为16进制
digit = list(map(str, range(10))) + list("ABCDEF")
if isinstance(value, tuple):
string = '#'
for i in value:
a1 = i // 16
a2 = i % 16
string += digit[a1] + digit[a2]
return string
def gerColorOfWeight1(minNum,maxNum,colorStart,colorend,number): #颜⾊，根据数值均分
colorR=(colorend["red"]-colorStart["red"])*(number-minNum)/(maxNum-minNum)+colorStart["red"]
colorG=(colorend["green"]-colorStart["green"])*(number-minNum)/(maxNum-minNum)+colorStart["green"]
colorB=(colorend["blue"]-colorStart["blue"])*(number-minNum)/(maxNum-minNum)+colorStart["blue"]
color= "rgb("+str(int(colorR))+','+str(int(colorG))+','+str(int(colorB))+')'
#color=getColorstr((int(colorR),int(colorG),int(colorB)))#转换为16进制颜⾊
return color
colorYouNeed=gerColorOfWeight1(min(weightlist),max(weightlist),{"red":255,"green":50,"blue":47} ,
{"red":139,"green":20,"blue":10} ,1000* errornum/linenum)

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