Fortran90 Array read blank values as null

Question

I'm reading data fram a external text file (30 Rows, 7 Columns), each row is seperated with a ",". I have missing values represented as ",,". When i read data into a two dimensional array the missing value is replaced with 0.00, but i have a 0.00 value in the data too. When i am computing average the count (number of items (n)) showd be count - (number of missing values). How can i pick the missing values dynamically.

Thanks Sri

DATA

337.60,220.40,0.00,0.00,200.42,216.61,261.04
323.00,249.20,65.30,0.00,201.93,210.91,309.98
116.80,474.80,0.00,0.00,203.43,215.76,234.93
72.10,505.90,0.00,0.00,204.93,215.72,233.47
148.30,771.70,0.00,0.00,206.44,217.00,239.05
90.70,287.20,0.00,0.00,207.94,215.43,216.85
337.20,334.50,10.20,0.00,209.45,226.85,306.57
142.50,142.80,0.00,0.00,210.95,240.09,240.31
279.10,289.60,51.80,0.00,212.45,227.75,262.30
273.60,337.70,0.00,0.00,213.96,256.86,223.66
332.40,425.60,0.00,0.00,215.46,238.36,237.63
45.70,299.30,0.00,0.00,216.96,223.92,241.41
49.10,529.40,0.00,0.00,218.47,235.81,282.17
185.30,331.80,38.00,0.00,219.97,235.81,309.29
552.90,454.80,0.00,0.00,221.47,224.60,269.09
176.20,441.60,0.00,0.00,222.98,232.44,293.95
170.00,,0.00,,,,327.96
200.00,,0.00,,,,291.69
241.20,156.00,0.00,0.00,227.49,235.55,278.66
118.00,383.20,3.20,0.00,228.99,269.28,325.31
62.00,189.70,0.00,0.00,230.50,248.73,266.95
400.20,244.20,0.00,0.00,232.00,239.70,271.27
163.70,826.60,0.00,500.00,233.50,245.06,294.98
250.40,236.60,0.00,0.00,235.01,261.72,288.24
51.30,684.20,0.00,0.00,236.51,245.06,237.37
412.50,128.90,0.00,500.00,238.01,245.16,268.66
452.00,,,,,,314.68
481.00,155.50,0.00,0.00,241.02,278.72,348.44
162.20,201.90,0.00,500.00,242.52,250.36,255.58
171.80,152.00,0.00,500.00,244.03,246.85,339.06

Answer 1

You do not seem to have negative values in your data, how about doing some pre-processing before passing the data to fortran, where you replace the ',,' with a negative value, for example with

sed 's/,,/,-1,/g'

Then you can easily identify these invalid data in your Fortran program and treat it accordingly.