MATLAB 语言基础知识 数据类型 数值类型 整数算术运算

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load integersignal

% Look at variables
whos Signal1 Signal2 Signal3 Signal4 Time1

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Name            Size            Bytes  Class     Attributes

  Signal1      7550x1              7550  int8                
  Signal2      7550x1              7550  int8                
  Signal3      7550x1             15100  int16               
  Signal4      7550x1             15100  uint16              
  Time1        7550x1             15100  uint16      

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plot(Time1, Signal1, Time1, Signal2);
grid;
legend('Signal1','Signal2');

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SumSig = Signal1 + Signal2; % Here we sum the integer signals.

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cla;
plot(Time1, SumSig);
hold on
Saturated = (SumSig == intmin('int8')) | (SumSig == intmax('int8')); % Find where it has saturated
plot(Time1(Saturated),SumSig(Saturated),'rd')
grid
hold off

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street1 = imread('street1.jpg'); % Load image data
street2 = imread('street2.jpg');
whos street1 street2

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  Name           Size                Bytes  Class    Attributes

  street1      480x640x3            921600  uint8              
  street2      480x640x3            921600  uint8   

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cla;
image(street1); % Display image
axis equal
axis off

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image(street2); % Display image
axis equal
axis off

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duller = 0.5 * street2; % Scale image with a double constant but create an integer
whos duller

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  Name          Size                Bytes  Class    Attributes

  duller      480x640x3            921600  uint8      

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subplot(1,2,1);
image(street2);
axis off equal tight
title('Original');  % Display image

subplot(1,2,2);
image(duller);
axis off equal tight
title('Duller');    % Display image

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combined = street1 + duller; % Add |uint8| images
subplot(1,1,1)
cla;
image(combined); % Display image
title('Combined');
axis equal
axis off