[89ea83]: comp / comp_window.m  Maximize  Restore  History

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155``` ```function [g,info] = comp_window(g,a,M,L,lt,callfun); %COMP_WINDOW Compute the window from numeric, text or cell array. % Usage: [g,info] = comp_window(g,a,M,L,s,callfun); % % [g,info]=COMP_WINDOW(g,a,M,L,lt,callfun) will compute the window % from a text description or a cell array containing additional % parameters. % % This function is the driving routine behind GABWIN and WILWIN. % % See the help on GABWIN and WILWIN for more information. % % See also: gabwin, wilwin % Basic discovery: Some windows depend on L, and some windows help define % L, so the calculation of L is window dependant. % Default values. info.gauss=0; info.wasrow=0; info.isfir=0; info.istight=0; info.isdual=0; isrect=(lt(2)==1); % Manually get the list of window names definput=arg_firwin(struct); firwinnames = definput.flags.wintype; % Create window if string was given as input. if ischar(g) winname=lower(g); switch(winname) case {'pgauss','gauss'} complain_L(L,callfun); g=comp_pgauss(L,a*M/L,0,0); info.gauss=1; info.tfr=a*M/L; case {'psech','sech'} complain_L(L,callfun); g=psech(L,a*M/L); info.tfr=a*M/L; case {'dualgauss','gaussdual'} complain_L(L,callfun); g=comp_pgauss(L,a*M/L,0,0); if isrect g=gabdual(g,a,M); else g=gabdual(g,a,M,'lt',lt); end; info.isdual=1; info.tfr=a*M/L; case {'tight'} complain_L(L,callfun); if isrect g=gabtight(a,M,L); else g=gabtight(a,M,L,'lt',lt); end; info.tfr=a*M/L; info.istight=1; case firwinnames [g,firinfo]=firwin(winname,M,'2'); info.isfir=1; if firinfo.issqpu info.istight=1; end; otherwise error('%s: Unknown window type: %s',callfun,winname); end; end; if iscell(g) if isempty(g) || ~ischar(g{1}) error('First element of window cell array must be a character string.'); end; winname=lower(g{1}); switch(winname) case {'pgauss','gauss'} complain_L(L,callfun); [g,info.tfr]=pgauss(L,g{2:end}); info.gauss=1; case {'psech','sech'} complain_L(L,callfun); [g,info.tfr]=psech(L,g{2:end}); case {'dual'} gorig = g{2}; [g,info.auxinfo] = comp_window(gorig,a,M,L,lt,callfun); if isrect g = gabdual(g,a,M,L); else g = gabdual(g,a,M,L,'lt',lt); end; % gorig can be string or cell array if info.auxinfo.isfir % Original window is FIR, dual window is FIR if length of the original % window is <= M. This is true if the length was not explicitly % defined (gorig{2}). if iscell(gorig) && numel(gorig)>1 && isnumeric(gorig{2}) && gorig{2}<=M... || ischar(gorig) info.isfir = 1; end end info.isdual=1; case {'tight'} gorig = g{2}; [g,info.auxinfo] = comp_window(gorig,a,M,L,lt,callfun); if isrect g = gabtight(g,a,M,L); else g = gabtight(g,a,M,L,'lt',lt); end; % The same as in dual? info.istight=1; case firwinnames g=firwin(winname,g{2},'energy',g{3:end}); info.isfir=1; otherwise error('Unsupported window type.'); end; end; if isnumeric(g) if size(g,2)>1 if size(g,1)==1 % g was a row vector. g=g(:); info.wasrow=1; end; end; end; if rem(length(g),M)~=0 % Zero-extend the window to a multiple of M g=fir2long(g,ceil(length(g)/M)*M); end; % Information to be determined post creation. info.wasreal = isreal(g); info.gl = length(g); if (~isempty(L) && (info.gl