Aaliyah Ebrahim wrote: > Hi
Hello again. Was your previous question answered to your satisfaction? > I am trying to practice the following question for my test tomorrow. > Please help me find my errors. > *Consider the following displacement sequence [x1; x2;..... x11] and > velocity sequence [v1; v2;....... v11]:x[k+1] = x[k]+ 0.1 v[k]v[k+1] = > v[k] - 10* x[k] + 0.1 sin(0.1* k *theta)Compute the maximum displacement > from the displacementsequence. Use theta = 1 [rad] and theinitial values > x1 = 0 and v1 = 0.* A few hints: The above description uses x1, ..., x11 to describe the entries in the sequence. Python on the other side uses zero-based indices: x[0], ..., x[10] # eleven entries A good start might be to convert the above task to that system before you begin coding. Be careful about the one place where k is not an array index. > Here is my code: > x = np.zeros(11) > v = np.zeros(11) > > x[0] = 1 > v[0] = 1 Where do the ones come from? > a = np.arange(1,10,1) How many entries does a have? How many should it actually have? > for k in a: > x[k+1] = x[k] + 0.1*v[k] > v[k+1] = v[k] - 10*x[k] +0.1*sin(0.1*k*1) Does this loop ever use the inital values v[0] and x[0]? > print(x.max()) > *This was a follow-up question with a suggested answer:Repeat the maximum > displacement computation for theta = 1; 2,3.... 20 [rad] and store the > maximum displacement for each in a list.from math import sinmax_disp = > []omega_values = range(1, 21, 1)for omega in omega_values: x = > [[0.0] > * 11 v = [0.0] * 11 for k in range(10): x[k+1] = x[k] + 0.1 * > v[k] v[k+1] = v[k] - 10 * x[k] + 0.1 * sin(0.1 * omega * (k + 1)) > max_disp.append( max(x) ) print(max_disp)* > My question is what do the lines in red mean? I'm sorry I see garbled text rather than colors. Please try to compose your messages using text only, not HTML. Thank you. _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
