Here's a quick-n-dirty Gaussian curve fitter, which I seem to reinvent about twice a year. There are a number of canned solutions that I can never remember how to use, but I also frequently find myself wanting to fit weird functions.
Below in a minimum working example. But the short-short version is
def func(x, *params): ... x,y = read_some_data() guess_params = [...] from scipy import optimize better_params, covariance = optimize.curve_fit( func, x, y, p0=guess_params)
It doesn't matter whether you "view source" or not. Although on my current browser, "view source" uses different rules for word-wrapping.
The other day I was
playing with tmux
and learned that I can drive stuff in remote windows.
But for doing this programmatically, the right tool is
Python, as usual.
Specifically, the tmuxp library,
which includes an interactive shell and a parser for readable config-files.
As much as I'm trying to have good hygiene, I occasionally install some unintended cruft in my "empty" python environments. A magic incantation to reset everything seems to be
pip freeze | xargs pip uninstall -y
I'm playing with termux-api,
which exposes a bunch of Android API things to the
termux command-line
environment. I'm kind of afraid that I'm going to hack together an
app using the command line. Excellent and hilarious and a terrible
idea. The kind of procrastination that looks like work.
In the spirit of the clipboard, the tool for
the clipboard on Chrome is wl-copy, from the package wl-clipboard.
On MacOs and perhaps some Linuxes, it may be save-buffer.
I've been playing with tmux
for making it possible to do more things from one terminal window.
Today I realized that you can type tmux commands in one shell, and
affect the contents of other windows. You can send keypresses.
I knew from the interactive help (C-b ?) that you can send a pane
within a window to a new window, but you can also capture panes from
one window in another. The command language is the same that you can
type at the C-b : command prompt; you can put them in a file and
process (from anywhere) with tmux source.
But the cuteness for now is that I can do
make continuous 2>&1 | tmux splitw -dI & make serve 2>&1 | tmux splitw -dI &
and have two long-running processes putting their outputs into one window, while I can control them from another.
The incantation that I was looking for to start an Android app from within the shell is
am start --user 0 -n net.gsantner.markor/net.gsantner.markor.activity.MainActivity
The problem is identifying the name at the back.
I've just spent a little time trying to learn how to use Nikola's "shortcodes", and I've learned enough delicate things that I want to write them down for later. Not least, there are descriptions of the shortcode syntax on two different very long and identically-formatted pages, the Nikola handbook and the guide to extending Nikola.
What I'd like to be able to do here is to edit the blog on the phone. But that's going to take a fair amount of automation, because doing anything on the phone is hard.
However, I think I've gotten it.
I've been trying to get to a point where I can edit my nikola blog stuff on my phone, and I am slowly figuring out how. Android does lots of careful sandboxing, and I have to work to undo it — especially since my preferred Android text editor, Markor, is intentionally unaware of any kind of sharing. I'm going to end up doing stuff in make, I'm afraid.
The installation for Jason Blevins'
markdown-mode is so
easy that I thought I wouldn't bother to write it down … but then I
looked in my note-taking place and I couldn't find it.
It's as simple as M-x package-install RET markdown-mode RET.
Everybody is using a package manager these days, and it's great.
I went to search for a way to keep a window "always on top" of other windows, and I discovered Microsoft PowerToys. There's a bunch of things in there that I haven't explored completely yet.
Working in an emacs buffer where I don't want to give up
whitespace-mode but I have a line that has to be long. The magic is
(setq-local whitespace-line-column 100)
If I want to type $a \times b$ without spelling out \times, here in
this lovely magical future, I should just be able to type ×. There
are different ways to do such things. What are they? Of course there
are websites. But I want command-line tools.
For whatever reason, lots of default shell setups make it hard to share SSH agents and their list of authenticated keys. Here's my fix:
I seem to be setting up new computing environments frequently. Here's a recipe for making Python nice.
Twenty-five years I've been using the Unix command-line for nearly all
of my computing, and it's only today that I learn about ln -r.
Today I wanted to make an illustration for which the correct tool was
tikz. I was writing for the web. Can I use tikz to put
stuff on the web?
HELL YES. There's a pdf2svg which gives vector graphics output.
One of the differences between the kind of text-mode/compile interface that I like to use, versus the WYSIWYG-style editors that the rest of the world has been using since forever, is that you generally have to do something or other in order to see whether your changes are having any effect. I've spent some time yesterday and today trying to come up with a mechanism to ease that transition, and I think I like what I have.
Reminded today of Windows's clip.exe, which reads its standard input
into the Windows paste buffer. That's the way to copy Linux/WSL stuff
to Windows. Mousing in the terminal window works ... sometimes. But
Emacs takes over the mouse, and the terminal copies my
whitespace-identifying characters.
The magic is M-| clip.exe, which runs shell-command-on-region.