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Use `expression()` to print math notations on plots in R

2021-10-17 03:31:07 作者：互联网

1 Basic operators
2 Large-scale operators
3 Upper and lower markers
4 Arrows
5 Set operations
6 Derivative notations
7 Special typefaces
8 Greek alphabet

?plotmath

1 Basic operators

Syntax	Meaning
`%*%`	\(\times\)
`%/%`	\(\div\)
`%+-%`	\(\pm\)
`x%%y`	\(x \cdot y\)
`sqrt(x)`	\(\sqrt{x}\)
`sqrt(x, y)`	\(\sqrt[y]{x}\)
`%prop%`	\(\propto\)
`infinity`	\(\infty\)
`==`	\(=\)
`%==%`	\(\equiv\)
`>=`	\(\geq\)
`<=`	\(\leq\)
`frac(x, y)`	\(\frac{x}{y}\)
`x%~~%y`	\(x \approx y\)
`x%=~%y`	\(x \approxeq y\)

2 Large-scale operators

Syntax	Meaning
`integral(f(x)*dx, a, b)`	\(\displaystyle \int_{a}^{b} f(x) dx\)
`sum(f(x), a, b)`	\(\displaystyle \sum_a^b f(x)\)
`prod(f(x), a, b)`	\(\displaystyle \prod_a^b f(x)\)
`union(A[i], i==1, n)`	\(\displaystyle \cup_{i = 1}^n A_i\)
`intersect(A[i], i==1, n)`	\(\displaystyle \cap_{i = 1}^n A_i\)
`lim(f(x), x>0)`	\(\displaystyle \lim_{x \rightarrow 0} f(x)\)
`min(f(x), x>0)`	\(\displaystyle \min_{x > 0} f(x)\)
`bgroup("(",atop(x, y),")")`	\(x \choose y\)

3 Upper and lower markers

Syntax	Meaning
`a^b`	\(a^b\)
`a[b]`	\(a_b\)

4 Arrows

Syntax	Meaning
`%<->%`	\(\leftrightarrow\)
`%->%`	\(\rightarrow\)
`%<-%`	\(\leftarrow\)
`%up%`	\(\uparrow\)
`%down%`	\(\downarrow\)
`%<=>%`	\(\Leftrightarrow\)
`%=>%`	\(\Rightarrow\)
`%<=%`	\(\Leftarrow\)
`%dblup%`	\(\Uparrow\)
`%dbldown%`	\(\Downarrow\)

5 Set operations

Syntax	Meaning
`x %subset% y`	\(x \sub y\)
`x %subseteq y`	\(x \subseteq y\)
`x %supset% y`	\(x \supset y\)
`x %supseteq% y`	\(x \supseteq y\)
`x %in% y`	\(x \in y\)
`x %notin% y`	\(x \notin y\)

6 Derivative notations

Syntax	Meaning
`hat(x)`	\(\hat{x}\)
`tilde(x)`	\(\tilde{x}\)
`dot(x)`	\(\dot{x}\)
`bar(X)`	\(\bar{x}\)
`widehat(xy)`	\(\widehat{xy}\)
`widetilde(xy)`	\(\widetilde{xy}\)
`partialdiff`	\(\partial\)
`nabla`	\(\nabla\)

7 Special typefaces

Syntax	Meaning
plain(x)	x
bold(x)	x
italic(x)	x
bolditalic(x)	x
underline(x)	x

8 Greek alphabet

Syntax	Meaning	Syntax	Meaning
`alpha` or `symbol(a)`	\(\alpha\)	`Alpha` or `symbol(A)`	\(\Alpha\)
`beta` or `symbol(b)`	\(\beta\)	`Beta` or `symbol(B)`	\(\Beta\)
`gamma` or `symbol(g)`	\(\gamma\)	`Gamma` or `symbol(G)`	\(\Gamma\)
`delta` or `symbol(d)`	\(\delta\)	`Delta` or `symbol(D)`	\(\Delta\)
`epsilon` or `symbol(e)`	\(\epsilon\)	`Epsilon` or `symbol(E)`	\(\Epsilon\)
`zeta` or `symbol(z)`	\(\zeta\)	`Zeta` or `symbol(Z)`	\(\Zeta\)
`eta` or `symbol(h)`	\(\eta\)	`Eta` or `symbol(H)`	\(\Eta\)
`theta` or `symbol(q)`	\(\theta\)	`Theta` or `symbol(Q)`	\(\Theta\)
`iota` or `symbol(i)`	\(\iota\)	`Iota` or `symbol(I)`	\(\Iota\)
`kappa` or `symbol(k)`	\(\kappa\)	`Kappa` or `symbol(K)`	\(\Kappa\)
`lambda` or `symbol(l)`	\(\lambda\)	`Lambda` or `symbol(L)`	\(\Lambda\)
`mu` or `symbol(m)`	\(\mu\)	`Mu` or `symbol(M)`	\(\Mu\)
`nu` or `symbol(n)`	\(\nu\)	`Nu` or `symbol(N)`	\(\Nu\)
`xi` or `symbol(x)`	\(\xi\)	`Xi` or `symbol(X)`	\(\Xi\)
`o` or `symbol(o)`	\(\omicron\)	`O` or `symbol(O)`	\(\Omicron\)
`pi` or `symbol(p)`	\(\pi\)	`Pi` or `symbol(P)`	\(\Pi\)
`rho` or `symbol(r)`	\(\rho\)	`Rho` or `symbol(R)`	\(\Rho\)
`sigma` or `symbol(s)`	\(\sigma\)	`Sigma` or `symbol(S)`	\(\Sigma\)
`tau` or `symbol(t)`	\(\tau\)	`Tau` or `symbol(T)`	\(\Tau\)
`upsilon` or `symbol(u)`	\(\upsilon\)	`Upsilon` or `symbol(U)`	\(\Upsilon\)
`phi` or `symbol(f)`	\(\phi\)	`Phi` or `symbol(F)`	\(\Phi\)
`chi` or `symbol(c)`	\(\chi\)	`Chi` or `symbol(C)`	\(\Chi\)
`psi` or `symbol(y)`	\(\psi\)	`Psi` or `symbol(Y)`	\(\Psi\)
`omega` or `symbol(w)`	\(\omega\)	`Omega` or `symbol(W)`	\(\Omega\)
`varphi` or `symbol(j)`	\(\varphi\)	`symbol(V)`	\(\varsigma\)
`symbol(v)`	\(\varpi\)	`symbol(J)`	\(\vartheta\)

标签：Use,symbol,sqrt,Syntax,notations,Meaning,xy,print,displaystyle
来源： https://www.cnblogs.com/zerozhao/p/expression_in_r.html