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Published on 2010-05-26T12:04:28Z
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How can I perform vector calculations in lisp, such as magnitude of a vector, norm of a vector, distance (between two points), dot product, cross product, etc.
Thanks.
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i have this huge function and i am wondering how to make it recursive. i have the base case which should never come true, so it should always go to else and keep calling itself with the variable t increases. any help would be great
thanks
def draw(x, y, t, planets):
if 'Satellites' in planets["Moon"]:
…
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I'm trying to calculate the sunset / rise times using python based on the link provided below.
My results done through excel and python do not match the real values. Any ideas on what I could be doing wrong?
My Excel sheet can be found under .. http://transpotools.com/sun_time.xls
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Hi Guys,
I'm constructing a geolocation based application and I'm trying to figure out a way to make my application realise when a user is facing the direction of the given location (a particular long / lat co-ord). I've got the math figured, I just have the triangle to construct.
//UPDATE
So…
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so I'm trying to make a program that will output the sum, average, and smallest and largest values. I have everything basically figured out except the smallest and largest values are outputting 2147483647 and -2147483647, which I believe are the absolute smallest and largest values that Java will…
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I've heard many times that all programming is really a subset of math. Some suggest that OO, at its roots, is mathematically based. I don't get the connection. Aside from some obvious examples:
using induction to prove a recursive algorithm
formal correctness proofs
functional languages
lambda calculus
asymptotic…
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I've learned enough Common Lisp to be able to muddle my way through writing an application. I've read Seibel's Practical Common Lisp
What libraries or programs should I be reading to understand the idioms, the Tao, of Common Lisp?
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There are no shortage of vague "Scheme vs Common Lisp" questions on StackOverflow, so I want to make this one more focused. The question is for people who have coded in both languages:
While coding in Scheme, what specific elements of your Common Lisp coding experience did you miss most? Or, inversely…
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Conventional wisdom states that OS kernels must be written in C in order to achieve the necessary levels of performance. This has been the justification for not using more expressive high level languages.
However, for a few years now implementations of Common Lisp such as SBCL have proven to be…
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I just started learning Common Lisp a few days ago, and I'm trying to build a function that inserts a number into a tree. I'm getting an error,
* - SYSTEM::%EXPAND-FORM: (CONS NIL LST) should be a lambda expression
From googling around, it seems like this happens when you have too many sets…
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I installed ltk to Steel Bank Common Lisp with asdf-install, but I can't even start using it V_V. The code below is the simplest example in the documentation, and is copied almost verbatim.
asdf:operate 'asdf:load-op :ltk)
(defun hello-1()
(with-ltk ()
(let ((b (make-instance 'button
…
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