Dany

Thank you so much. It works. But I did not understand how did you convert from struct type. Can you describe what you did there?

GDL> help,im ** Structure <Anonymous>, 1 tags, data length=16: FLUX FLOAT 7.21362e-14 GDL> print,im { 7.21362e-14}{ 9.81093e-14}{ 1.24088e-13}{ 1.76038e-13}{ 3.05966e-13}{ 3.83869e-13}{ 4.61675e-13}{ 7.47248e-13}{ 6.43441e-13} GDL> print,total(im.b) % Tag name: B is undefined for STRUCT. % Execution halted at: $MAIN$ What am I doing wrong? im contains the data i need to sum

GDL> im=mrdfits('/home/dhanya/Desktop/data/S605010100000ano4ttagfcal.fit',1,COLUMNS=2,RANGE=[3112,20]) MRDFITS: Binary table. 3 columns, no rows. GDL> im=mrdfits('/home/dhanya/Desktop/data/S605010100000ano4ttagfcal.fit',1,COLUMNS=2,RANGE=[3112,3120]) MRDFITS: Binary table. 3 columns by 9 rows. GDL> print,im { 7.21362e-14}{ 9.81093e-14}{ 1.24088e-13}{ 1.76038e-13}{ 3.05966e-13} { 3.83869e-13}{ 4.61675e-13}{ 7.47248e-13}{ 6.43441e-13} GDL> c=total(im) % $MAIN$: Struct expression not allowed in this...

hi, I am trying to read FITS file using mrdfits.pro and I want to add the elements of the array I am getting. I tried tsum.pro and checksum32.pro to add but it is giving error as it cannt add struct type array. So i need a program which add the elements of the array i am getting