By Gehren T.
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Extra info for Einfuehrung in die Astronomie und Astrophysik
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Use Mouse-2 in order to select the command you are interested in, or type and complete the rest of its name (you may use [TAB] again). Read about the function in the *Help* buffer that opens. • variables: Do the same after typing C-h v in order to see a variable’s value and documentation. • command apropos: Have you forgotten the exact name of a command? No problem... Type C-h a and a keyword. All commands related to the keyword you typed will appear in a buffer. Use C-h d for even more information.
6 prints the name of the product (1st column = $1) and the total value stored in the warehouse (2nd column = $2) × (4th column = $4). 85 > awk ’{ p r i n t $2^2 * sin ( $4 ) + exp ( $4 ) } ’ data The first one calculates the total value of all products: The processing of each line results in the increment (+=) of the variable value by the product of the second and fourth fields. In the end (END{ ... }), the string Total= is printed, together with the final value of the variable value. This is an easy way for computing the sum of the values calculated for each line.
IF ( x . eq . 0 . 0 ) ! T e s t s : a , b , c= 1 2 3 D= −8 ! a , b , c= 1 −8 16 D= 0 x1= 4 ! a , b , c= 1 −1 −2 D= 9 . x1= 2 . x2= −1. 422 x1= 3. 1 ! But : 6 . 732 ! 73199 ! 29894924 ! 48 1 2 5 . 000210891725 < 0 ! ! ============================================================= program trionymo i m p l i c i t none real : : a , b , c , D r e a l : : x1 , x2 r e a l : : Discriminant p r i n t * , ’ Enter a , b , c : ’ read * , a , b , c ! T e s t i f we have a w e l l d e f i n e d polynomial o f 2nd degree : i f ( a .