MATLAB中的RoundUP函数

Question

我想写一段代码，它可以把一组数据集合起来，然后打印到小数点后的3位。我知道我需要使用Ceil函数，但不知道如何编写正确的代码。我的代码只打印1和2！例如，1.2345圈到2.000圈。我想用ceil函数把这个数字除以为1.235。

我的代码是：

row = 1;
col = 1;
HIGH_ERROR = 2.5;
LOW_ERROR = 0.0;
% Read the file
rawData = dlmread('data_1.csv',',');
% Get the size
[MAX_ROWS, MAX_COLS] = size(rawData);
errorMap = double(zeros(MAX_ROWS, MAX_COLS));
value = ceil(rawData(row, col)*1000/1000);
%Print the raw data
fprintf('Raw Data\n');
for row = 1 : MAX_ROWS
for col = 1 : MAX_COLS
    fprintf('%0.3f ', rawData(row, col));
end
fprintf('\n');
end 
%Print the Error Map
fprintf('Error Map\n');
for row = 1 : MAX_ROWS
for col = 1 : MAX_COLS
    if rawData(row, col) > HIGH_ERROR
        errorMap(row, col) = rawData(row, col);
        rawData(row, col) = HIGH_ERROR;
        if rawData(row, col) < LOW_ERROR
        errorMap(row, col) = rawData(row, col);
        rawData(row, col) = LOW_ERROR;   
        end
    end
fprintf('%0.3f ', errorMap(row, col));
end
fprintf('\n');
end
%Print the Rounded Data
fprintf('Rounded Data\n');
for row = 1 : MAX_ROWS
for col = 1 : MAX_COLS
    value = ceil(rawData(row, col)*1000/1000);
    fprintf('%0.3f ', value);
end
fprintf('\n');
end

Answer 1

我想你想

value = ceil(rawData(row, col)*1000)/1000;

Answer 2

对于任何有round()的语言来说，一个很好的技巧应该是：

-> ceil(x) = round(x + 0.5).

(地板) -> floor(x) = round(x - 0.5)。