how to put y axis greek letters in Veusz plot? - plot

I want to put Capitalomega with index DE and k label:
and then ı want to show on the y axis label? How to do them?


Generally you can use tex symbols in Veusz. Therefore, you can write \Omega_{DE} and \Omega_{k} for your request. See details here (Sec. 2.4 Text).
Veusz understands a limited set of LaTeX-like formatting for text. There are some differences (for example, "10^23" puts the 2 and 3 into superscript), but it is fairly similar. You should also leave out the dollar signs. Veusz supports superscripts ("^"), subscripts ("_"), brackets for grouping attributes are "{" and "}".
Supported LaTeX symbols include: \AA, \Alpha, \Beta, \Chi, \Delta, \Epsilon, \Eta, \Gamma, \Iota, \Kappa, \Lambda, \Mu, \Nu, \Omega, \Omicron, \Phi, \Pi, \Psi, \Rho, \Sigma, \Tau, \Theta, \Upsilon, \Xi, \Zeta, \alpha, \approx, \ast, \asymp, \beta, \bowtie, \bullet, \cap, \chi, \circ, \cup, \dagger, \dashv, \ddagger, \deg, \delta, \diamond, \divide, \doteq, \downarrow, \epsilon, \equiv, \eta, \gamma, \ge, \gg, \in, \infty, \int, \iota, \kappa, \lambda, \le, \leftarrow, \lhd, \ll, \models, \mp, \mu, \neq, \ni, \nu, \odot, \omega, \omicron, \ominus, \oplus, \oslash, \otimes, \parallel, \perp, \phi, \pi, \pm, \prec, \preceq, \propto, \psi, \rhd, \rho, \rightarrow, \sigma, \sim, \simeq, \sqrt, \sqsubset, \sqsubseteq, \sqsupset, \sqsupseteq, \star, \stigma, \subset, \subseteq, \succ, \succeq, \supset, \supseteq, \tau, \theta, \times, \umid, \unlhd, \unrhd, \uparrow, \uplus, \upsilon, \vdash, \vee, \wedge, \xi, \zeta. Please request additional characters if they are required (and exist in the unicode character set). Special symbols can be included directly from a character map.
Other LaTeX commands are supported. "\" breaks a line. This can be used for simple tables. For example "{a\b} {c\d}" shows "a c" over "b d". The command "\frac{a}{b}" shows a vertical fraction a/b.
Also supported are commands to change font. The command "\font{name}{text}" changes the font text is written in to name. This may be useful if a symbol is missing from the current font, e.g. "\font{symbol}{g}" should produce a gamma. You can increase, decrease, or set the size of the font with "\size{+2}{text}", "\size{-2}{text}", or "\size{20}{text}". Numbers are in points.
Various font attributes can be changed: for example, "\italic{some italic text}" (or use "\textit" or "\emph"), "\bold{some bold text}" (or use "\textbf") and "\underline{some underlined text}".
Example text could include "Area / \pi (10^{-23} cm^{-2})", or "\pi\bold{g}".
Veusz plots these symbols with Qt's unicode support. You can also include special characters directly, by copying and pasting from a character map application. If your current font does not contain these symbols then you may get a box character.


In addition to the answer OmG posted, you can also directly enter the character (via a character map application or copy and paste), as Veusz supports unicode characters.

Related

How can I add more glyphs in my True type font?

I am creating my series of glyphs in a custom font but I can only see glyphs which occupy the character spaces from U+0020 up until U+007f when the font is read by other programs. Is there a setting to allow all other characters to be read? In my font all characters after are called "control characters".
Thanks for any tips.

Glyphs which you add to your font appear based on the character that their encoding matches. If you add characters with no encoding, of course they won't be avaialble. You could consider giving them encodings of e.g. U+F000, U+F001, etc., which are in the Unicode Private Use Area. Then you could paste such characters into your program, or if you use Linux, some desktop environments allow you to press CtrlShiftU and type e.g. f000 and get the character U+F000.

paste0 regular and italicized text in R

I need to concatenate two strings within an R object: one is just regular text; the other is italicized. So, I tried a lot of combinations, e.g.
paste0(" This is Regular", italic( This is Italics))
The desired result should be:
This is Regular This is Italics
Any ideia on how to do it?
Thanks!

In plot labels, you can use expressions, see mathematical annotation :
plot(1,xlab=expression("This is regular"~italic("this is italic")))

To provide an string for which an HTML parser will recognise the need to render the text in Italics, wrap the text in <i> and </i>. For example: "This is plain text, but <i>this is in Italics</i>.".
However, most HTML processors will assume that you want your text to appear as-is and will escape their input by default. This means that the special meanings of certain characters - including < and > will be "turned off". You need to tell the processor not to do this. How you do that will depend on context. I can't tell you that because you haven't given me context.
Are you for example, writing to a raw HTML file? (You need do nothing.) Are you writing to a Markdown file? If so, how? In plain text or in a rendered chunk? Are you writing a caption to a graphic? (Waldi has suggested a solution.) Etc, etc....

Insert specific unicode symbols inside values of data.frame variable

In my data.frame I would like to add two variables, "A" and "B", whose values contain respectively an n with the i subscript and an n with the s subscript.
As I have understood so far, it's not possible to specify an expression for the values of a variable, and hence to add special characters it's necessary to use unicode symbols. Some of this unicodes work in R, as for example the greek letter "mu", identified with the unicode \U00B5, or numeric subscripts, as you can see in this reprex in your R console:
x <- data.frame("A" = c("\U00B5"),
"B" = c("B\U2082"))
print(x)
These unicodes work also if I decide to put this variable in a ggplot() object, because I will display the correct symbol ("mu" for example) on the axis text or the facets.
The problem is that when I do the same for the subscripts of i (unicode: \U1D62) and s (unicode: \u209B), R doesn't recognise the unicode and prints the whole string inside the variable name.
Do you know how I can resolve this issue and if this unicode works on every operating system?
Thanks

Is there a reason you can't use the expression() function? It seems this would solve your problem (at least concerning greek letters).
Here is the site i used to learn how to input greek letters into my R/ggplot-legends.
https://stats.idre.ucla.edu/r/codefragments/greek_letters/
Altough it is not exactly the answer you look for, i still hope it helps!

If you are on Windows 10 recently updated with as of April 2018 Update:
Use the Windows key + '.' (e.g. hold together Windows Key plus period) in your text editor. This brings up Microsoft Emoji keyboard.
Select the Greek letters variable for your script.
The R Console will not accept the Greek letters as variables directly but only the from the editor script. Some of the Greek letters don't translate to English (like "µ" or "ß".) You can paste and copy them from ls() output to access. You may be able to use some math symbols as well for variable names. I can't however, get this to work with source(). That must be a text encoding problem.

writing single-storey ɑ in Gnuplot graph title?

How can I write single-storey ɑ (The first letter in English) in Gnuplot graph title?
I am always get "a" (double-story) in Gnuplot plot title?

Suggesting to use the Greek letter alpha "ɑ" is not a good solution.
The correct answer is that the shape of the "a" glyph is dependent on the font, not the encoding. Unicode codepoints only specify what character is to be drawn, not what shape it has.

It depends on the terminal you want to use, but probably the most straightforward solution would be to use proper encoding and paste the required character directly:
set encoding utf8
set term wxt font "Times,12"
set title 'ɑ'
plot x
EDIT:
the special character ɑ can be also specified (for example in the interactive Gnuplot console) in terms of its UTF8 representation (two octal numbers) as:
set title '\311\221'

I only use lubunutu and do not use ubunutu.
In lubuntu CharacterMap utility exists and it can be used from accessory category.
On ubuntu, the same tool exists.
https://help.ubuntu.com/community/CharacterMap
I could copy and paste Lattin Small Letter alpha "ɑ" to terminal.
(Note that is not literally single-storey version of a).
As Ethan wrote use of Lattin Small Letter alpha "ɑ" is not correct in literal sense but I think this is possible workaround.
Correct solution is use font with single-storey a like Futura font.
Free Futura font seem to be available from
http://www.webpagepublicity.com/free-fonts-f4.html#Free%20Fonts

How to fix prettytable to display chinese character properly

from prettytable import PrettyTable
header="乘客姓名,性别,出生日期".split(",")
x = PrettyTable(header)
x.align["乘客姓名"]="l"
table='''HuangTianhui,男,1948/05/28
姜翠云,女,1952/03/27
李红晶,女,1994/12/09
LuiChing,女,1969/08/02
宋飞飞,男,1982/03/01
唐旭东,男,1983/08/03
YangJiabao,女,1988/08/25
买买提江·阿布拉,男,1979/07/10
安文兰,女,1949/10/20
胡偲婠(婴儿),女,2011/02/25
(有待确定姓名),男,1985/07/20
'''
data=[row for row in table.split("\n") if row]
for row in data:
x.add_row(row.strip().split(","))
print(x)
What I want the output format is as the following.
In this example, prettytable.py can not display properly chinese ambiguous width of character · in 买买提江·阿布拉 , the character has ambiguous width. How to fix the bug in prettytable.py?
I have add two lines in def _char_block_width(char) of prettytable.py, but the problem still remains.
if char == 0xb7:
return 2
I have solved it, the file prettytable.py should be installed in my computer d:\python33\Lib\site-packagesdirectly not in as the form of d:\python33\Lib\site-packages\prettytable\prettytable.py
There are many chinese character with ambiguous width, it is stupid for us to add two lines such as the following to fix the bug, if there are 50 ambiguous character,100 lines will be added in the prettytable.py, is there a simple way to do that? Just fix some lines to treat all the ambiguous character?
if char == 0xb7:
return 2

The issue you're running into has to do with the dot character in the incorrectly padded line of your Python output. The dot is Unicode code point U+00B7 · middle dot. This character is considered to have an "ambiguous" width, as it is a narrow character in most non-East-Asian fonts, but is rendered a full-width in most Asian ones. Without context, a program can't tell how wide it will appear on the screen. Unfortunately, Python's Unicode system doesn't appear to have any way to provide that context.
One fix might be to replace the offending dot with one that has an unambiguous width, such as U+30FB katakana middle dot (which is always full width). This way the padding logic will be able to recognize that extra space is needed for that line.
Another solution could be to set your console to use a font with more Western treatment of the middle dot character, rather than the current one that follows the East-Asian style of rendering of it as full-width. This will mean that the existing padding is correct. Your output from R clearly uses a different font that the Python output does, and its font renders the dot as half-width.

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