344 



WAVE ANALYSIS. 



[Exp. 



19. Example. Required to analyze the wave shown in Fig. 3, the 

 following 12 ordinates at 30 intervals being known : 



y< = + 4.3 

 y* = 8 - 2 



= + 1.4 

 = 9-3 



y 2 =--+i2.o 



y = - 4-6 

 :y 10 = 9-9 



y, = -6.8 

 y= 6.8 



SCHEME. 



Ordinates: +14-0 + 15.8 + 12.0 + 77 + 4.3 +1.4 



6.8 9.9 9.3 8.2 6.8 4.6 



TABLE. 



Check: ^ i ^ 3 



-^ + ,4 3 



Check: + , 



+ 5 8 + 4 + B 5 + B 6 = 



7.6; 



941 

 14.0; 



4-6; 



= 7-7; 

 = - 9-3; 

 = 14.0; 

 = 4-6. 



