write the matlab command that counts the number of missing values represented by the value nan in javascript

main.m
% create sample data
data = [1 2 NaN 4 5 NaN 7 NaN 9];

% count number of NaN values
n_missing = sum(isnan(data));
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index.tsx
// create sample data
var data = [1, 2, NaN, 4, 5, NaN, 7, NaN, 9];

// count number of NaN values
var n_missing = 0;
for (var i = 0; i < data.length; i++) {
    if (isNaN(data[i])) {
        n_missing++;
    }
}
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