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| Hello Roger, I certainly feel for you. You clearly have a problem which can't be assigned to the computer hardware, since it has occurred with different computers. At the same time, it cannot be common. I use Mathematica daily, and read both this... |
| # Introduction This Mathematica code determines the component values for a low-pass active filter implemented using the Sallen-Key architecture. The filter will be a second order Chebyshev filter of type 1. This filter offers a steep cut off at the... |
| It is also possible to define a function of w (meaning omega) to produce the values needed. For example, below the transfer function magnitude in dB is calculated: tf = 20/(20 + s) (* 20/(20+s) *) tfw = tf /. s -> I w ... |
| Perhaps this: (* transfer function *) tf = (1/2 s + 1/10)/s // Simplify; (* the input *) in = LaplaceTransform[Sin[w t], t, s]; (* output in t domain *) outt = InverseLaplaceTransform[tf in, s, t]; ... |
| That’s really good, Rohit. |
| There are no doubt one-line statements which can do this, but here is a hopefully understandable approach: (* objective function *) obj[x_] := (x - 5)^2 + 3 Plot[obj[x], {x, 0, 10}] (* candidate values *) xList... |
| Hi Scott, There are two syntax issues in your code. In the definition of mu0, there is no space between Pi and 10, which makes it a symbol. Also in the definition of k Pi f occurs with no space. When I correct these I still get a FindRoot error... |
| It is interesting that we can download ^GSPC from Yahoo, but can't access it using FinancialData. I really hope these issues can be resolved on a permanent basis. |
| Try Needs["Fred`"] Notice the context mark after Fred. |
| If you filter mathematica stackexchge for posts having the tag bugs you get 1529 posts with 96 from this year. Have these been reviewed by Wolfram? |