怎么解决这个错误信息？ '使用图像时出错使用图像CDate所需的数字或逻辑矩阵

Question

我有以下代码：

tile {6} = imread ('tw.png','png');
tile {5} = imread ('twpw.png','png');
tile {4} = imread ('twpb.png','png');
tile {3} = imread ('tb.png','png');
tile {2} = imread ('tbpw.png','png');
tile {1} = imread ('tbpb.png','png');

board = zeros(8,8)

% the board image matrix is first empty (no tile )
board = [];

% we add four empty white tiles to the first row
board = [ board tile {6} tile {6} tile {6} tile {6}];

% we add four black tiles with white pawn to the second row
board = [ board ; tile {2} tile {2} tile {2} tile {2}];

figure(1);
image(board);
set (gcf ,'Position ' ,[150 150 50* c 50* r]);

但我收到错误：

  

使用图片时出错。

     

图像CData所需的数字或逻辑矩阵

为什么我的电路板不能出现？

Answer 1

表达式tile {i}中没有空格，它应该是tile{i}。

否则它被解释为tile（整个单元格数组），然后是{i}（包含标量值的单元格数组），而不是使用tile{i}索引到数组中以获取第i个细胞内容。

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编辑：

以下是一些代码来说明：

% cell-array of tiles
tile{1} = zeros(5,5);    % black tile
tile{2} = ones(5,5);     % white tile
tile{3} = ones(5,5)*0.5; % gray tile

% build a 2x3 matrix of "blocks"
board = [tile{2}, tile{1}, tile{2} ;
         tile{1}, tile{3}, tile{1}];

% show as indexed image with a grayscale colormap
imagesc(board), axis image
colormap(gray(3))
h = colorbar; set(h, 'YTick',[0 0.5 1])