[英]How to access a cell of a grid using a 2d array in python?
I'm tryin to bilerp a cell into one value using python for a NetCDF data set. 我正在尝试使用python将NetCDF数据集的一个单元格变为一个值。 I'm new to python and I can't understand what I'm doing wrong here.
我是python的新手,我不明白自己在做什么错。 I have a 2d array and I give the four points by iterating through the dataset dataArr.
我有一个二维数组,并通过遍历数据集dataArr给出了四个点。 I use Lerp method for the calculation.
我使用Lerp方法进行计算。 Somehow when I pass the 3 values it seems to consider it as more than 3. What am I doing wrong here?
不知何故,当我传递3个值时,似乎认为它大于3。在这里我做错了什么? Thanks in adv.
感谢在广告中。
This is the error I get>> self.Lerp((dataArr[i][j]),(dataArr[i+1][j]),fraction) takes exactly 3 arguments (4 given) 这是我得到的错误>> self.Lerp((dataArr [i] [j]),(dataArr [i + 1] [j]),fraction)正好接受3个参数(给定4个)
def compute(self,varval):
vars=self.data.variables
for var in vars:
if var==varval:
ntimes, ny, nx=vars[var].shape #inherit the method above.
print(ntimes, ny, nx)
#create the old computational grid.
computational_grid=np.zeros((ny,nx),dtype=int)
fraction=.5
newnx,newny =(nx*fraction,ny*fraction)
new_computational_grid=np.zeros((newny,newnx),dtype=int)
phy_value_arr=self.get_data(varval)
t=10 #send this t value with coords
dataArr=self.data.variables['tos'][t]
for i in range(0,(ny-1),1):
for j in range(0,(nx-1),1):
a=self.Lerp((dataArr[i][j]),(dataArr[i+1][j]),fraction)
b=self.Lerp((dataArr[i][j]),(dataArr[i+1][j]),fraction)
self.tempY.append(self.Lerp(a,b,fraction))
tempY.reshape(newnx,newny)
pcolormesh(self.tempY)
colorbar()
def Lerp( _a, _b, _t) :
return _a+(_b-_a)*_t
You call Lerp like tihs: 您像tihs一样称呼Lerp:
self.Lerp(a,b,fraction)
By definition it will put self as the first argument. 根据定义,它将把self作为第一个参数。 Thus you will have four in total.
因此,您总共将有四个。 However, you define Lerp as
但是,您将Lerp定义为
def Lerp( _a, _b, _t) : #<- this takes only three arguments
I think it should be: 我认为应该是:
def Lerp(self, _a, _b, _t) : #<- this takes four, and self is first one
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