The simplest example of the change being sought is a greek letter, typed in as plaintext nu, and its may be replaced by the symbol, ν:
expr = 3nu*kx*ky+
expr /. nu -> ν yielding
However, I need to make a variable with a subscript correspond to a large number of different subscript values (many different possibilities for x in "k_x").
In any one of my (100+) equations, it's easy enough to change its couple of variables to their more visually comprehensible counterpart manually using the above method along with
Subscript, but I am having trouble finding an efficient way to have Mathematica take ANY given
kz and output the corresponding
A method of achieving this here automatedly from Mathematica taking a glance at my plaintext system of equations would be great.
Edit: After talking with Bill S briefly in the comments, he suggested I upload an example of what I have so far and what I hope to accomplish. If arrays are a better way to handle a majority of my input, even in conjunction with subscripts at times, I am more than willing to use them. Here's an examplary 3 equations where R# signifies the rate of change of Z[#], where Z[#] on the RHS only coincidentally contains the function bracket notation due to use of other software.
R6 = kf*(z + mu*z) - 2*z + mu*kd^2*z - kd^2*z R7 = kf*(z + mu*z - 2*z) + kd^2*z + kd^2*z R8 = kf*(z + (mu*z - 2*z) + kd^2*z + kd^2*z
As you can see, the number of options for x in k_x is only 2: f & d, so I can input the
/. rules easily manually. However, to avoid confusion between my plaintext input form's z[x] and Mathematica's traditional single-function notation, I would like to change ALL z[x] to z_x (z with subscript x), regardless of specific x. However, here there are 140 different values rather than 2, so manually inputting each
/. rule is less practical.
My current goal is to simplify the appearance and allow for symbolic manipulation of all the parameters, but I do hope to do curve-fitting eventually. Does anyone have advice on how to approach this scenario, either via subscripts or
Array? I suspect # and possibly
ToRules will be involved but am not sure yet how to do this.
Answered! Please see the answer and, if you're only interested in efficiently replacing any symbolic expression with another, see the comment on the answer.