Get mathematica to simplify expression with another equation
2011年11月10日 · I have a very complicated mathematica expression that I'd like to simplify by using a new, possibly dimensionless parameter. An example of my expression is: K=a*b*t/((t+f)c*d); (the actual expression is monstrously large, thousands of characters). I'd like to replace all occurrences of the expression t/(t+f) with p. p=t/(t+f);
ForEach loop in Mathematica - Stack Overflow
Newer versions of Mathematica (6.0+) have generalized versions of Do[] and Table[] that do almost precisely what you want, by taking an alternate form of iterator argument.
How to show plots inside a loop in mathematica - Stack Overflow
2011年4月6日 · I am wondering if you have good ways to show plots inside a loop in mma. Usually, the output of Plot function is not shown, for example in the following code: For[i = 1, i <= 10, i++, Plot[Sin[...
syntax - What does # mean in Mathematica? - Stack Overflow
2012年3月19日 · That means Mathematica doesn't know how to caculate a symbolic result. It's just the first root of the polynomial. But it does know what is its numerical value: In[7]:= N@Root[-1 - 2 #1 - #1^2 + 2 #1^3 + #1^4 &, 1] Out[7]= -2.13224 So, Root[f,k] is a kind of stenographic writing for roots of polynomials with order > 3. I save you from an ...
Mathematica: Extract numerical value when using Solve
2011年8月23日 · Mathematica - Solve equation as an expression of two variables. 0. Mathematicas: How to solve equation in ...
Mathematica Module versus With or Block - Stack Overflow
2011年7月13日 · Leonid wrote in chapter iv of his book : "... Module, Block and With. These constructs are explained in detail in Mathematica Book and Mathematica Help, so I will say just a few words about them here. ..." From what I have read ( been able to find ) I am still in the dark.
math - Mathematica matrix diagonalization - Stack Overflow
2012年1月14日 · Mathematica returns normalized eigenvectors for numeric matrices. p2 = Transpose[Eigenvectors[N[a]]] This is risky, though, because computing the inverse of a numeric matrix can often fail spectacularly due to various numerical errors.
Is there a way to clear everything before starting in Mathematica ...
2016年4月28日 · If you want to remove all symbols from the kernel so that Mathematica doesn't recognize them anymore, you can use Remove[] similar to the above two examples. Barring these, you can always quit the kernel with Quit[] which will remove all symbols. A fresh kernel will be initiated the next time you evaluate something.
How to reshape matrices in Mathematica - Stack Overflow
2010年3月18日 · In the case of converting between a matrix and vector I can use the Mathematica function Flatten which takes advantage of Mathematica's nested list representation for matrices. As a quick example, suppose I have a matrix X:
Mathematica: Show Complex Numbers in Polar Form
2010年10月14日 · In Mathematica (as in math in general) is more convenient to use radians than degrees. Expressed in ...