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I'm working in Qgis with python console. I have a file .asc whose structure is:

Ncols 49

Nrows 52

Xllcorner 2611187.75

Yllcorner 4336914.199

Cellsize 1000

NODATA_value -9999

0.5081 0.679 -9999 ...

I have to find the maximum value in the file and I tried:

GridFile = open('filepath \ file.asc', 'r')
MaxValue = max (GridFile)

But the procedure returns the following error

ValueError: max () is an empty sequence.

What I understand is that I have to skip the first 6 lines and find the maximum of successive values, but I do not know how to do it.

I'm working in Qgis with python console. I have a file .asc whose structure is:

Ncols 49

Nrows 52

Xllcorner 2611187.75

Yllcorner 4336914.199

Cellsize 1000

NODATA_value -9999

0.5081 0.679 -9999 ...

I have to find the Max and the Min value in the file and I tried:

GridFile = open('filepath \ file.asc', 'r')
MaxValue = max (GridFile)
MinValue = min (GridFile)

But the procedure returns the following error

ValueError: max () is an empty sequence
ValueError: min () is an empty sequence

What I understand is that I have to skip the first 6 lines and find the maximum and the minimum of successive values, but I do not know how to do it.

I'm working in Qgis with python cnsole. I have a file**.asc** whose structure is:

Ncols 49

Nrows 52

Xllcorner 2611187.75

Yllcorner 4336914.199

Cellsize 1000

NODATA_value -9999

0.5081 0.679 0.7024 0.6603 0.5643 0.4668 0.4865 0.4715 0.3534 0.4496 0.4205 0.442 0.4031 0.4352 0.3941 0.3504 0.2506 0.2586 0.3519 0.2247 0.2494 0.3148 0.3963 0.4558 0.4613 0.4471 0.4366 0.4119 0.4474 0.3852 0.4362 0.3907 0.4118 0.5387 0.4045 0.4721 0.5246 0.6007 0.5516 0.5795 0.6485 0.6084 0.6288 0.4513 -9999 -9999 -9999 -9999 -9999
0.5434 0.5707 0.5578 0.5205 0.5995 0.5414 0.5542 0.4757 0.4744 0.4276 0.3882 0.4132 0.4445 0.5414 0.3823 0.2908 0.2554 0.2356 0.2631 0.3037 0.3778 0.4221 0.4259 0.5337 0.4998 0.4603 0.3888 0.4412 0.4615 0.453 0.4019 0.4295 0.4321 0.4383 0.4226 0.4113 0.3462 0.5567 0.3907 0.3432 0.6684 0.7217 0.7315 0.6078 0.6322 0.529 -9999 -9999 -9999 ...

I have to find the maximum value in the file and I tried:

GridFile = open('filepath \ file.asc', 'r')
MaxValue = max (GridFile)

But the procedure returns the following error

ValueError: max () is an empty sequence.

What I understand is that I have to skip the first 6 lines and find the maximum of successive values, but I do not know how to do it.

Can anyone help me solve this problem?

Thanks

I'm working in Qgis with python console. I have a file .asc whose structure is:

Ncols 49

Nrows 52

Xllcorner 2611187.75

Yllcorner 4336914.199

Cellsize 1000

NODATA_value -9999

0.5081 0.679 -9999 ...

I have to find the maximum value in the file and I tried:

GridFile = open('filepath \ file.asc', 'r')
MaxValue = max (GridFile)

But the procedure returns the following error

ValueError: max () is an empty sequence.

What I understand is that I have to skip the first 6 lines and find the maximum of successive values, but I do not know how to do it.