本文主要是介绍Use `expression()` to print math notations on plots in R，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！
目录
- 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) |
\(\vartheta\) |
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