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# to you under the Apache License, Version 2.0 (the
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F = read($1, data_type="frame", format="csv");

spec = "{ids: false, recode: [ zipcode, district, view ]}";
[X, M] = transformencode(target=F, spec=spec);

spec2 = "{ids: false, recode: [ district ]}";
X2 = transformapply(target=F[,2], spec=spec2, meta=M);

R = as.matrix(sum(X[,2]==X2));

write(R, $2);