rotrat改装车

㈠ T和R再加个什么字母能变成三个字母的，英语单词，翻译。

这个问题有意思
t和r之间：
1.tar [tɑ:] n. 焦油；柏油；水手
vt. 涂以焦油；玷
2.thr
vt. 用力推；刺（等于thrust）
3.tor
n. 石山；[地]突岩
4.tyr
酪氨酸；（北欧神话）战神蒂尔
r和t之间：
1.rat [ræt] n. 鼠；卑鄙小人，叛徒
vi. 捕鼠；背叛，告密
2.ret [ret] vi. 受潮湿腐烂；浸水使柔软
vt. 受潮湿腐烂；浸水使柔软
3.rot n. 腐烂；腐败；腐坏
vi. 腐烂；腐败；堕落
vt. 使腐朽；使腐烂；使堕落
int. （表示厌恶、蔑视、烦恼等）胡说；糟了
4.rut n. 惯例；性冲动；发情期；凹槽
vt. 挖槽于；在…形成车辙
vi. 发情

㈡ matlab中rot函数的源码

% 没有 rot 而有 rat ，不知是否你要的
% 安装目录\toolbox\matlab\specfun\rat.m

function [N,D] = rat(X,tol)
%RAT Rational approximation.
% [N,D] = RAT(X,tol) returns two integer matrices so that N./D
% is close to X in the sense that abs(N./D - X) <= tol*abs(X).
% The rational approximations are generated by truncating continued
% fraction expansions. tol = 1.e-6*norm(X(:),1) is the default.
%
% S = RAT(X) or RAT(X,tol) returns the continued fraction
% representation as a string.
%
% The same algorithm, with the default tol, is used internally
% by MATLAB for FORMAT RAT.
%
% Class support for input X:
% float: double, single
%
% See also FORMAT, RATS.

% Copyright 1984-2004 The MathWorks, Inc.
% $Revision: 5.18.4.4 $ $Date: 2004/07/05 17:02:10 $

% Approximate x by
%
% 1
% d1 + ----------------------------------
% 1
% d2 + -----------------------------
% 1
% d3 + ------------------------
% 1
% d4 + -------------------
% 1
% d5 + --------------
% 1
% d6 + ---------
% 1
% d7 + ----
% d8
%
% The d's are obtained by repeatedly picking off the integer part and
% then taking the reciprocal of the fractional part. The accuracy of
% the approximation increases exponentially with the number of terms
% and is worst when x = sqrt(2). For x = sqrt(2), the error with k
% terms is about 2.68*(.173)^k, which is
%
% 1 4.6364e-01
% 2 8.0210e-02
% 3 1.3876e-02
% 4 2.4006e-03
% 5 4.1530e-04
% 6 7.1847e-05
% 7 1.2430e-05
% 8 2.1503e-06
% 9 3.7201e-07
% 10 6.4357e-08

if nargin < 2
tol = 1.e-6*norm(X(isfinite(X)),1);
end
if ~isreal(X)
if norm(imag(X),1) <= tol*norm(real(X),1)
X = real(X);
elseif nargout > 1
[NR,DR] = rat(real(X));
[NI,DI] = rat(imag(X));
D = lcm(DR,DI);
N = D./DR.*NR + D./DI.*NI*i;
return
else
N = strvcat(rat(real(X)),' +i* ...',rat(imag(X)));
return
end
end
if nargout > 1
N = zeros(size(X), class(X));
D = zeros(size(X), class(X));
else
N = zeros(0,0,class(X));
end
for j = 1:numel(X)
x = X(j);
if ~isfinite(x), % Special case for inf, -inf, NaN
if nargout <=1
s = int2str(x);
k = length(s)-size(N,2);
N = char([N ' '*ones(j-1,k); s ' '*ones(1,-k)]);
else
if ~isnan(x), N(j) = sign(x); else N(j) = 0; end
D(j) = 0;
end
else
k = 0;
C = [1 0; 0 1]; % [n(k) n(k-1); d(k) d(k-1)];
while 1
k = k + 1;
neg = x < 0;
d = round(x);
if ~isinf(x),
x = x - d;
C = [C*[d;1] C(:,1)];
else % Special case for +/- inf
C = [[x;0] C(:,1)];
end
if nargout <= 1
d = int2str(abs(d));
if neg, d = ['-' d]; end
if k == 1
s = d;
elseif k == 2
s = [s ' + 1/(' d ')'];
else
p = min(find(s==')'));
s = [s(1:p-1) ' + 1/(' d ')' s(p:p+k-3)];
end
end
if (x==0) | (abs(C(1,1)/C(2,1) - X(j)) <= max(tol,eps(X(j))))
break
end
x = 1/x;
end
if nargout > 1
N(j) = C(1,1)/sign(C(2,1));
D(j) = abs(C(2,1));
else
k = length(s)-size(N,2);
N = char([N ' '*ones(j-1,k); s ' '*ones(1,-k)]);
end
end
end

㈢ 汽车电脑板上的英文是什么意思比如“IGT”是英文“IGNIROT”（即点火器）

是点火的意思 不过是这么写的 IGNITION