CODEWITHSUNDEEP
matlabrounding
user8591488
user8591488

Reputation: 3

RoundUP function in MATLAB

I want to write code which can round up a set of data and then print it to 3 decimal places. I know that I need to use Ceil function but don't know how to write the correct code. What my code prints is 1 and 2 only! For example for number 1.2345 rounds up to 2.000. I would like to round the number to be 1.235 using ceil function.

My code is:

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

Upvotes: 0

Views: 2439

Answers (2)

Royi
Royi

Reputation: 4953

A nice trick which should work on any language which has round() would be:

Round Up (Ceil) -> ceil(x) = round(x + 0.5).

Round Down (Floor) -> floor(x) = round(x - 0.5).

Upvotes: 0

SCFrench
SCFrench

Reputation: 8374

I think you want

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

Upvotes: 1

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