How to sum row by row using app scripts? - google-sheets

Question

I am trying to sum row by row and have values in grand total cell for respective rows.
I tried looping in the app scripts. But couldn't. Can anyone help me with this?
I have this data from b3:f16 and I need grand total in h3:h16
1906 904 106 221 1640
1771 842 97 188 1338
3221 1005 252 260 6323
3239 1141 317 287 7828
3556 1409 352 337 8890
3417 1307 303 382 7143
3264 1824 358 444 9288
2724 1916 196 395 3462
2641 1829 151 430 3255
4076 1858 398 471 12844
3986 2098 468 426 13411
4829 2504 422 514 14449
4462 4876 452 507 13285
5017 6654 423 410 7765
Code:
function adder() {
var sheet = SpreadsheetApp.getActiveSheet().getSheetByName("sheet1");
var data = sheet.getRange("B3:F16").getValues();
var range = sheet.getRange("H3:H16");
for(var i = 0; i < data.length; i++) {
var sum = 0;
for(var j = 0; j < data[i].length ; j++) {
sum += data[i][j];
}
range.setValue(sum);
Logger.log(sum);
}
}

Answer 1

this could be done with MMULT..
In G3, try:
=ArrayFormula(mmult(B3:F16, transpose(column(B3:F3)^0)))
If you want to use script, see if this works:
function adder() {
var sheet = SpreadsheetApp.getActive()
.getSheetByName("sheet1"),
res = [];
sheet.getRange("B3:F16")
.getValues()
.forEach(function (r) {
res.push([r.reduce(function (a, b) {
return a + b;
})])
});
sheet.getRange("H3:H16")
.setValues(res);
}
or with 'classic' for loops:
function adder2() {
var sheet = SpreadsheetApp.getActive()
.getSheetByName("Test"),
res = [],
sum,
data = sheet.getRange("B3:F16")
.getValues();
for (var i = 0, rlen = data.length; i < rlen; i++) {
sum = 0;
for (var j = 0, clen = data[0].length; j < clen; j++) {
sum += Number(data[i][j])
}
res.push([sum])
}
sheet.getRange("H3:H16")
.setValues(res);
}