@halirutan Well, I don't know about must have, but some useful things: 1. Control-click a symbol to go to its definition (but how do you find the definitions? the FE does have something similar though). 2. reliable refactoring, e.g. rename symbol (or does it work already?) 3. function-dependent warnings about syntax errors (the WB does it and it was quite useful when I was writing unit tests for MATLink)
@Szabolcs Beside the support of local variable names, there is an issue I find annoying: When you type f[x_ it suggests everything after the blank. What would you expect it to do there which helps the most? Do nothing until we see a ? or suggest a /; or or or..
@Szabolcs Let me answer that:
(1) is one of the next things to do. It's called referencing and you find the definitions by walking up the parse tree and looking for :=, = or /: or whatever. Then you know the reference and where/whether it is localized.
@Szabolcs (2) This is a hard one, because you have to find reliable all occurrences without destroying variables which are not in the current localization (Module/Block/With)
@halirutan For this I need definitely some ideas from Leonid who could help to make this more robust.
Just make it possible to have reliable symbol replace: the system should know what is a symbol without me having to tell it (e.g. asd_asd is not a symbol but asd$asd is)
@halirutan I'd find it useful to have more fine-grained syntax highlighting. E.g. highlight patterns and if possible, highlight built-in symbols. It catches errors.
I wasn't. I disabled some plugins I wouldn't use, I restarted, it was fine. I switched to the browser, then a minute later switched back and noticed what happened. I'm not saying it was your plugin.
@halirutan I'd like to ask you some basic questions about Idea itself:
@halirutan Is Refactor simply not working with Mathematica files? Rename gives me "Rename Symbol Impl and its usage to", but no matter what I type in the text box, nothing happens.
@halirutan I created a project. It created IGraphR.iml and lots and lots of xml files inside .idea. Are all of these part of the project description and necessary for the system to function?
@Szabolcs Yes it possible easily. Let's take the patterns as example. What I would have to do is implement an annotator which matches parts of the parse tree. Then you can highlight those parts.
(when I type a comment, after (* a little idea comes up suggesting to "inject a language". I was hoping I could mark R code as such in string. But I'll look it up later. Got to go!)
@Ghersic I could pretend that I was already out, got drunk, a lot of girls and I'm now sober again programming ;-) but that would be a lie. I read a good night story to my daughter, watched Expendables 2 with my wife and hmm now I'm programming.
@rm-rf Indeed there is. We will need a lot of people who have a very detailed idea about how features should work. Example:
Let's say you have a package-file and the parse-tree (which is pretty much the TreeForm). Now you see var1+3 anywhere in the code. Can you determine reliably in which local Module/Block or where var1 was defined?
@belisarius Well, if it discomfits you to answer whether you possess a tonsure, a ponytail, or whatever, then you should certainly refuse to answer. :)
(For my part, my hair has the appearance of salt-and-pepper.)
@J.M. Lately several notorious members are posting a lot of answers as comments. You're one of most conspicuous doing that. I'm not sure if that is a good policy ...
@belisarius If I could elaborate for everyone's benefit, I'd write a full answer. I'm all for shortness, but I don't quite like dumping bare code or dumb unhashed guesses as answers.
I want to do cross product involve paulimatix vector $\vec \sigma = \left( {{\sigma _1},{\sigma _2},{\sigma _3}} \right)$, for example, $\vec \sigma \times \left( {1,2,3} \right)$
s:= Table[PauliMatrix[i], {i, 1, 3}];
Cross[s,{1,2,3}]
The above code will not work.
The only way I can think o...
Sometimes I see code samples in the document or in this site using Directive, but I haven't yet find a case that Directive is necessary for so long. Usually it can be replaced just by List(except for Graphics and Graphics3D, in which Directive can be replaced by Sequence) and the appearance of th...
question1:
(code 1 something wrong, Why? and how to overcome this to achieve the next code's effect)
Inner[RotationTransform,{Pi/4,Pi/4,Pi/4},{{0,0,1},{1,0,0},{0,0,1}},Composition]
(code2 it's ok, but seems type too much characters)
Inner[RotationTransform,{Pi/4,Pi/4,Pi/4},{xx,yy,zz},Composi...
@belisarius I don't think it answers (my interpretation of) OP's question of "can I live without Directive[]?". Clearly, one can do without it if you're sufficiently determined...
Yes? It was a mistake, I realized this is not a bijection. The right word is correspondence: there are pairs having some decimal number and some matrix.
I need to create custom axises like the tickers and I need to somehow add a grid and add information here and there.
I am not sure whether Mathematica is the easiest to do them, just photoshoping?
When I tried to use ticker for the axis, they become too closely packed -- there must be better command.
Here the plot is from 1 to 40 but I should rename them from 0 until 0.99: x-axis having 2nd decimal and y-axis having 1st decimal
Suppose very simple plot like this: is it possible to overwrite the axis things (4,6,8,10 etc) with something like (0,0.01, 0.02, ...,0.99) -- without actually changing the photo?
MatrixPlot[RandomInteger[{0, 1}, {10, 10}],
FrameTicks -> {
{{1, "my house"}},
{{1, "yo house"}, {8, Framed@Column[{
"ergo, you too far to do anything.\n now look at this plot:",
Plot[x^2, {x, 0, 1}]}]}},
{{1, "yo mamma house"}, {2, "B"}},
{{1, "yo sista house"}}}]
to give you an idea of the flexibility
there is also a similar Mesh option. you just need to use the documentation. F1 is your friend.
Is it possible to create something like this? I created this with photoshop but now wanting to do it in Mathematica. Is this label and some grid command?
@amr Thank you, I cannot understand one thing with it: is it possible to add a tick over the photo with alpha channel like the above or is it always on the border?
@hhh Look, let me be frank with you (for the hundredth time!): If you want to use Mathematica as a serious tool, then buck up and start using the documentation and learning how to use the different options yourself. Don't keep asking one little question after the other in chat/main instead of using the tools already available (you've been doing this for over 6 months now). You can't be playing the "Oh, I'm still a newbie" card for that long.
If you are not interested in learning Mathematica, then please continue to use Photoshop and be done with it.
@hhh Also, you deleted today a question after it had been downvoted once. Just imagine how the users that had started to answer that one feel towards you now ....
Well, it was bad question -- worth to be downvoted. Only I can say is sorry but I don't want to ask poor questions -- if I understand why it is poor, I let it go and start over.
@rm-rf Well, you know. When you find something you can't understand, and you was already exposed to a few clever faculty members, you tend to doubt yourself too
@rm-rf I've a list, and a list of lengths. Is there something that builds me a list of sequential sublists with that lengths? Example follows
@rm-rf I wonder why someone would come to a site devoted to Mathematica programming thinking that the crystallographic or the vulcanolastic jargons will be welcome
Given several discrete random variables such that $p(Z_i=1-2k)=p$, where $k$ is a small real number, and $p(Z_i=-1)=1-p$, a random walk is the sum $X_t = \sum\limits_{i=1}^t Z_i$.
The expectation is given by:
$$\mathbb{E}[X_t] = \sum\limits_{i=1}^t\mathbb{E}[Z_i] = \sum\limits_{i=1}^tp(1-2k) -(1...
I created there a tick for "0.99 same as 1.00.", I guess there is some arrow command to make it more elegant pointing to the corner -- well things I know so far. My next goal is to add there density plot with rainbow colours (and more data), will look cool -- but I want to do it :D
I want to do cross product involve paulimatix vector $\vec \sigma = \left( {{\sigma _1},{\sigma _2},{\sigma _3}} \right)$, for example, $\vec \sigma \times \left( {1,2,3} \right)$
s:= Table[PauliMatrix[i], {i, 1, 3}];
Cross[s,{1,2,3}]
The above code will not work.
The only way I can think o...
question1:
(code 1 something wrong, Why? and how to overcome this to achieve the next code's effect)
Inner[RotationTransform,{Pi/4,Pi/4,Pi/4},{{0,0,1},{1,0,0},{0,0,1}},Composition]
(code2 it's ok, but seems type too much characters)
Inner[RotationTransform,{Pi/4,Pi/4,Pi/4},{xx,yy,zz},Composi...
