Praktický matlabí skriptík latex exportuje zadanou matici přímo do konzole a umožňuje tak rychle zkopírovat matici z Matlabu do LaTeXu. Je to mnohem rychlejší, než používat public či skripty jako latex2matlab, kde se musí vyplňovat název souboru, pak jej otevřít... Tady prostě zavoláte funkci, Ctrl+C a Ctrl+V a máte to v latexu.
Samozřejmě se jedná o m-file, takže si jej můžete poupravit k obrazu svému. Já třeba nepoužívám matice v matematickém režimu, takže jsem dal na řádce 39 prázdný mathstr, abych nemusel funkci volat s parametrem.
Příklad použití:
A = [1 2; 5 6]; latex(A)
Získáme v konzoli přímo:
1.0000 & 2.0000 \\ 5.0000 & 6.0000
Reference latex - File Exchange - MATLAB Central.
Pozor - Matlab sám obsahuje od roku 2005 funkci "latex", která ale umí zobrazit jen symbolický zápis. Umí jej ale i včetně zlomků.
function s = latex(M,varargin) %LATEX Print a matrix in LaTeX tabular format. % LATEX(M) prints out the numeric matrix M in a LaTeX tabular % format. The '&' character appears between entries in a row, '\\' % is appended to the ends of rows, and each entry is set in math % mode. Complex numbers are understood, and exponentials will be % converted to a suitable format. % % LATEX(M,'nomath') does not include the $$ needed to put each % entry in math mode (e.g., for use with the amsmath matrix modes). % % LATEX(M,FMT) uses a format specifier FMT of the SPRINTF type for % each entry. % % LATEX(M,FMT1,FMT2,...) works through the given format specifiers % on each row of M. If fewer are given than the column size of M, % the last is used repeatedly for the rest of the row. % % S = LATEX(M,...) does not display output but returns a character % array S. % % Examples: % latex( magic(4) ) % latex( magic(4), '%i', 'nomath' ) % latex( magic(4), '%i', '%.2f' ) % % See also SPRINTF, SYM/LATEX. % Copyright 2002 by Toby Driscoll. Last updated 12/06/02. % Changes: JANKO, 2012/10/24 if ~isa(M,'double') error('Works only for arrays of numbers.') elseif ndims(M) > 2 error('Works only for 2D arrays.') end % start JANKO if nargin < 2 fmt = {'%g'}; % changed from %#.5g mathstr = ''; % changed from $ else fmt = varargin; idx = strmatch('nomath',fmt); if isempty(idx) mathstr = ''; % changed from $ else mathstr = ''; fmt = fmt([1:idx-1 idx+1:end]); if isempty(fmt), fmt = {'%#.5g'}; end end end % Extend the format specifiers. [m,n] = size(M); if n > length(fmt) [fmt{end:n}] = deal(fmt{end}); end % Create one format for a row. rowfmt = ''; for p = 1:n % Remove blanks. thisfmt = deblank(fmt{p}); % Add on imaginary part if needed. if ~isreal(M(:,p)) % Use the same format as for the real part, but force a + sign for % positive numbers. ifmt = thisfmt; j = findstr(ifmt,'%'); if ~any(strcmp(ifmt(j+1),['-';'+';' ';'#'])) ifmt = [ifmt(1:j) '+' ifmt(j+1:end)]; else ifmt(j+1) = '+'; end ifmt = [ifmt 'i']; thisfmt = [thisfmt ifmt]; end % Add to row. rowfmt = [rowfmt mathstr thisfmt mathstr ' & ']; end % After last column, remove column separator and put in newline. rowfmt(end-1:end) = []; rowfmt = [rowfmt '\\\\\n']; % Use it. A = M.'; if isreal(M) S = sprintf(rowfmt,A); else S = sprintf(rowfmt,[real(A(:)) imag(A(:))].'); end % Remove extraneous imaginary part for real entries. if ~isreal(M) zi = sprintf(ifmt,0); S = strrep(S,zi,blanks(length(zi))); end % Remove NaNs. S = strrep(S,'$NaN$','--'); S = strrep(S,'NaN','--'); % Convert 'e' exponents to LaTeX form. This is probably really slow, but % what can you do without regular expressions? S = strrep(S,'e','E'); ex = min(findstr(S,'E')); while ~isempty(ex) % Find first non-digit character. Where is ISDIGIT? j = ex+2; while ~isempty(str2num(S(j))) & ~strcmp(S(j),'i') j = j+1; end % This strips off leading '+' and zeros. num = sprintf('%i',str2num(S(ex+1:j-1))); ee = ['\times 10^{' num '}']; S = [S(1:ex-1) ee S(j:end)]; ex = ex + min(findstr(S(ex+1:end),'E')); end % For good form, remove that last '\\'. S(end-2:end-1) = ' '; % start JANKO, inserted code cc = ''; for i=1:size(M,2) cc = [cc 'c']; end S = [sprintf('\\left[\n\\begin{array}{') cc sprintf('}\n') S sprintf('\\end{array}\n\\right]')]; % end JANKO % Display or output? if nargout==0 disp(S) else s = S; end
editor = matlab.desktop.editor.getActive; % vezmeme vybrany text selected = editor.SelectedText; % spustime vybrany kus kodu data = latex(eval(selected)); clipboard('copy', data);
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