II - ( 02 ) 1,,,, 2, 3. ( ) HP,. 2 MATLAB MATLAB, C Java,,., MATLAB, Workspace, Workspace. Workspace who. whos. MATLAB, MATLAB Workspace. 2.1 Workspac

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1 II - ( 02 ) 1,,,, 2, 3 ( ) HP, 2 MATLAB MATLAB, C Java,,, MATLAB, Workspace, Workspace Workspace who whos MATLAB, MATLAB Workspace 21 Workspace 211 Workspace save, Workspace, MATLAB MAT, load, MAT Workspace 01:,,, MAT (p01mat),, >> clear; >> A = rand(3); >> B = eye(3); >> save p01; >> pause; >> clear; >> load p01; >> A >> B ( ) save, load, mat, (, dat txt ) Workspace,, MATLAB ascii, >> load ( ), -mat >> load -mat 1

2 212 Workspace Workspace, 02: A, B, C : >> A = [1:4]; >> B = diag(a,0); >> C = zeros(3,2); save help,, A p02 1mat, B C p02 2mat Workspace, 213 Workspace save -ascii, Workspace type,, 03: 02 A, B p03dat Workspace,, ( ) ( 2 A, B, C ( / ) ) 22 C, MATLAB, fprintf fscanf 221,, fopen, fclose : >> fid = fopen( example1txt, w ); >> a = 1; >> b = 01; >> fprintf(fid, example: a = %d, b = %f\n, a, b); >> fclose(fid); fopen 1 ( example1txt ) 2 w, ( ) 2 : w r a ( ) 222 fprintf fscanf fprintf, 1, 2, 3 1, fopen fclose C printf, 1, 2

3 C printf fprintf : >> x = 0:01:1; >> y = [x; exp(x)]; >> fid = fopen( example2txt, w ); >> fprintf(fid, Exponential Function\n\n ); >> fprintf(fid, %62f %128f\n, y); >> fclose(fid);, y fprintf, y %62f 2 6, %128f : MATLAB : , fprintf, y, 1, 1 fprintf, p04txt, p04m 04, MATLAB,, MATLAB fscanf fscanf 3 1, 2 3,, : n inf [m, n] n ( ) m n (n inf ) fscanf 2 1, 2 ( ) 3

4 example3txt : >> fid = fopen( example3txt, r ); >> [A, count] = fscanf(fid, %d %f, [3, 2]); >> fclose(fid); A, count 223, fgetl fgets 1, s = fgetl( ), s fgetl fgets, 05: (p05txt): nagoya tokyo5 100 osaka nara kyoto p05m,, (p05 ctxt): nagoya tokyo5 osaka nara 00kyoto (p05 ntxt): , (EOF) feof ( ) isletter help, 1,,,, ( ) 4

5 01: fid = fopen( filename, r ); 02: while feof(fid) == 0 % 03: data = fgetl(fid); % 1 04: if (sum(isletter(data)) > 1) 05: % ( ) 06: else 07: % 08: end 09: end 10: fclose(fid); isletter, (help ) 1, isletter(data) 1 MATLAB,, fwrite, fread, 3 ( ) MATLAB,, 31, ( ) ( ) p06txt ( 2 ),,,,, name, win, struct : = struct( 1, 1, 2, 2, ) : 1 = 1, 2 = 2,, : (1) = struct( 1, 1-1, 2, 1-2, ) (2) = struct( 1, 2-1, 2, 2-2, ) 5

6 , (1) 1 = 1-1, (1) 1 = 1-2, (2) 1 = 2-1, (2) 2 = 2-2, 06: p06txt, Team Team, ( 2 ) name, win lose draw, ( / ), p06m,, : 1: fid = fopen( filename, r ); 2: i = 0; 3: while feof(fid) == 0 4: i = i + 1; 5: S(i)member1 = fscanf(fid, ); 6: S(i)member2 = fscanf(fid, ); 7: 8: end, S(1), S(2), member1, member2,, fscanf : fieldnames ( ) fieldnames(team) rmfield ( ) Team = rmfield(team, draw ) isstruct ( ) isstruct(team) GUI 32,,,, 1, p06txt 1 Team = { DE, 67, 64, 8 },,, : C = {10, [2 4; 5 7; 3 8], ABC, [1 3 5]},, cell : cell(3); % 3 3 6

7 2,, 2 2 x = cell(2) (2,2) [1 2; 3 4], : >> X{2,2} = [1 2; 3 4]; % 1 >> X(2,2) = {[1 2; 3 4]}; % 2 cellfun celldisp cellplot cell2mat mat2cell iscell, 07: , 1, 2,,, 3 06 p07m 4, 41 2 MATLAB, 411, plot, y = f(x), plot plot help,, >> x = 0 : pi/100 : 2*pi; % pi >> y = sin(x); % sin >> plot(y);, 0 x 2π sin(x) π/100 ( ),, x, plot(y) plot(x, y),, x, y, ( ) 7

8 - : -- - c m y r g b w k, sin, >> plot(x, y, :r+ ) + o * x s d ^ v > < p h,,,, 2 >> plot(, LineWidth, ( )); 412, figure >> 1 ; >> figure; >> 2 ; >> figure; >> >> n ; 08: 2π x 2π ( π/20 ) sin(x) cos(x) x, 8

9 , p08m 1, plot : >> plot(x 1, y 1, 1, x 2, y 2, 2, );, plot, hold on, plot hold off >> plot(); >> hold on; >> plot(); >> plot(); >> hold off; 09( ): 08 hold on, hold off, plot 1, sin(x) 3, cos 2 (x), 05, p09m subplot, 1 plot >> subplot(m, n, p);, m n p 10( ): 09 3, 2 3 1,, p10m 413,,,,,,, title xlabel ylabel text gtext grid legend x y ( ), (plot ), axis, >> axis([xmin, xmax, ymin, ymax]);, x y xmin x xmax, ymin y ymax, >> axis auto; 9

10 axis,, >> axis square; x, y 1:1, >> axis off;, >> axis on; 414,, H, >> H = plot();,, : >> set(h, 1, 1, 2, 2, ); LineStyle, LineWidth, Color, Marker >> x = 0:pi/100:2*pi; >> H = plot(x, sin(x), x, sin(2*x), x, sin(3*x)); >> set(h, { LineStyle }, { : ; - ; -- },{ LIneWidth },{10;3;5}, { Color },{ r ; g ; b });,, figure F1 >> F1 = figure( Position, [ ]); figure Position 4 [Xp, Yp, Xr, Yr],, (Xp, Yp), Xr, Yr F1, >> figure(f1);, F1 figure 2, >> x = 0:pi/100:2*pi; >> plot(x, sin(x));, axes, figure, figure figure, >> A1 = axes( Position, [ ]); 10

11 axes Position, 4 figure 11( ): 1, 2 2,, p11m 1, (100, 500) (300, 100), N(10, 25), N(20, 20), { sin(x)/x, if x 0, sinc(x) = 1, if x = 0, Ex(70), Be(03, 06), G(10, 20),, N(µ, σ 2 ), Ex(α), Be(α, β) G(α, ν),,,, : N(µ, σ 2 ) = 1 µ)2 exp{ (x 2πσ 2 2σ 2 }, Ex(α) = { α exp( αx), if x 0, 0, if x < 0, Be(α, β) = { 1 B(α,β) xα 1 (1 x) β 1, if 0 x 1, 0, otherwise, G(α, ν) = { 1 Γ(ν) αν x ν 1 e αx, if x 0, 0, if x < 0, B(α, β) Γ(ν) Matlab beta gamma 3, 3 (legend) figure,,, 11

12 1 plot 2 help bar pie hist contour 42 3 MATLAB, 3, 2, >> t = [0 : pi/100 : 10*pi]; >> x = sin(t); >> y = cos(t); >> plot3(x, y, t); >> view(-75, 30); % -75, 30 >> pause; >> view(-75, 60); >> pause; >> view(-90, 90); %, view(2) >> pause; 12

13 >> view(3); %, view(-375, 30) plot3 meshgrid, x { 3, 15, 0, 15, 3}, y { 2, 1, 0, 1, 2} f(x, y) = x 2 + y 2 2, >> x = [-3 : 15 : 3]; >> y = [-2 : 10 : 2]; >> [X, Y] = meshgrid(x, y); >> Z = X^2 + Y^2; >> plot3(x, Y, Z);, z : f( 30, 20) f( 15, 20) f(+30, 20) f( 30, 10) f( 15, 10) f(+30, 10) Z = f( 30, +20) f( 15, +20) f(+30, +20) 12: x 5, y 3 01, 2 f(x, y) = exp( x 2 y 2 ),,, x, y, z p12m Z, mesh, surf, plot3 mesh surf, colorbar,, North South 13

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web07.dvi 93 7 MATLAB Octave MATLAB Octave MAT MATLAB Octave copyright c 2004 Tatsuya Kitamura / All rights reserved. 94 7 7.1 UNIX Windows pwd Print Working Directory >> pwd ans = /home/kitamura/matlab pwd cd Change