I might have been influenced by the preceding double is in tadashii .  But I find that tadachi ni is frequently written and printed in two words, ni meaning `in,' so that tadachi ni just might be equivalent to something like `in the immediate.
( ( ( ( I ( ( might ( have ( been ( influenced ( by ( ( the ( preceding double ) ) ( is ( in tadashii ) ) ) ) ) ) ) ) . ) ) But ) ( I ( find ( ( ( ( ( that ( ( tadachi ni ) ( ( is frequently ) ( ( ( ( ( written and ) printed ) ( in ( two words ) ) ) , ) ( ni ( ( meaning ` ) in ) ) ) ) ) ) , ) ' ) so ) ( that ( ( tadachi ni ) ( just ( might ( be ( equivalent ( to ( something ( ( like ` ) ( in ( the immediate ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (PRP I)) (VP (MD might) (VP (VB have) (VP (VBN been) (VP (VBN influenced) (PP (IN by) (NP (NP (DT the) (VBG preceding) (NN double)) (SBAR (S (VP (VBZ is) (PP (IN in) (NP (NNS tadashii)))))))))))) (. .)) (CC But) (S (NP (PRP I)) (VP (VBP find) (SBAR (SBAR (IN that) (S (NP (NN tadachi) (NN ni)) (VP (VBZ is) (ADVP (RB frequently)) (VP (VBN written) (CC and) (VBN printed) (PP (IN in) (NP (CD two) (NNS words))) (, ,) (S (VP (ADVP (RB ni)) (VBG meaning) (`` `) (ADVP (RB in)))))))) (, ,) ('' ') (CC so) (SBAR (IN that) (S (NP (NN tadachi) (NN ni)) (ADVP (RB just)) (VP (MD might) (VP (VB be) (ADJP (JJ equivalent) (PP (TO to) (NP (NP (NN something)) (PP (IN like) (`` `) (PP (IN in) (NP (DT the) (JJ immediate)))))))))))))) (. .)))
While not technically incorrect, it is not often done in a formal setting.
( ( While ( not ( technically incorrect ) ) ) ( , ( it ( ( ( is not ) ( often ( done ( in ( a ( formal setting ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN While) (S (RB not) (ADJP (RB technically) (JJ incorrect)))) (, ,) (NP (PRP it)) (VP (VBZ is) (RB not) (VP (ADVP (RB often)) (VBN done) (PP (IN in) (NP (DT a) (JJ formal) (NN setting))))) (. .)))