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Evaluate X and Y returned from the differential equation solvers using printput frequency in Python

python 水墨上仙 2163次浏览 已收录 手机上查看

Evaluate X and Y returned from the differential equation solvers using printput frequency in Python

''' printSoln(X,Y,freq).
    Prints X and Y returned from the differential
    equation solvers using printput frequency 'freq'.
        freq = n prints every nth step.
        freq = 0 prints initial and final values only.
'''
def printSoln(X,Y,freq):
 
    def printHead(n):
        print "\n        x  ",
        for i in range (n):
            print "      y[",i,"] ",
        print
 
    def printLine(x,y,n):
        print "%13.4e"% x,
        for i in range (n):
            print "%13.4e"% y[i],
        print
 
    m = len(Y)
    try: n = len(Y[0])
    except TypeError: n = 1
    if freq == 0: freq = m
    printHead(n)
    for i in range(0,m,freq):
        printLine(X[i],Y[i],n)
    if i != m - 1: printLine(X[m - 1],Y[m - 1],n)


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