用matlab语言编写

当然，如果你想要用MATLAB编写一个将十进制数转换为指定位数二进制数的函数，可以这样做：

function binaryArray = decimalToBinary(decimal, bitLength)
    % Ensure the input number is a scalar
    if ~isscalar(decimal)
        error('Input must be a single numeric value.');
    end
    
    % Convert to binary string and remove '0b' prefix
    binaryStr = dec2bin(decimal);
    
    % Truncate or pad with zeros based on the desired bit length
    binaryStr = binaryStr(2:end);
    binaryArray = zeros(bitLength, 1); % Create an array of zeros
    if length(binaryStr) > bitLength
        binaryArray = uint8(binaryStr(1:bitLength)); % Keep only first bitLength bits
    else
        binaryArray = [uint8(binaryStr), ones(bitLength-length(binaryStr), 1)];
    end
end

% Example usage
decimalNum = 42;
bitLength = 8;
binaryArray = decimalToBinary(decimalNum, bitLength);
disp(['Decimal ' num2str(decimalNum) ' as binary (8 bits): ' num2str(binaryArray)])
%