FRANKFURT — Former Vice President Richard M. Nixon arrived here Thursday afternoon as a tourist following a visit behind the Communist wall in Berlin and made it clear he has "no plans to be a candidate" for political office.

Nixon declined to express his views on the Kennedy Administration with the quip, "I won't talk abroad." He added, "If I agree, I say so," but he reserved his criticism until "returning home."

In East Berlin, Nixon sneaked out on the town for two hours (without being covered by Communist agents) Wednesday night. He reported, "The people want freedom and would certainly have it if they had their choice. Over and over they mentioned the wall."

Nixon, who is touring Europe with his wife and two teen-age daughters in an unofficial capacity, said, "Budapest is a free city compared to this. You have to see it to believe it."

Nixon warned against any Russian attempt to link a nuclear test ban treaty with an East-West nonaggression pact. He said the American people and Congress would never accept a nonaggression pact that would "mean recognition of the so-called East German government and perpetual slavery for millions of people behind the Iron Curtain."

He added, "We would never agree in effect to condemning millions of people to slavery."

Nixon, saying he plans to practice law in preference to politics, added that his political activities will be "limited to making speeches, writing articles and supporting candidates."

He sidestepped the question of candidates by saying that "any one of four would have a chance." He declined to list any names or discuss individuals but did say, "I want the one that looks best to lead the free world."

He said he believed the Republican party would take a more positive attitude for the people behind the Iron Curtain than the Democrats. And he said, "I don't think there will be any change to the commitment to defend freedom."

Nixon faced a battery of television and press cameras on his arrival. His two daughters echoed his views that it was very sad in East Berlin with "the glass on top of the wall," but "we are having a wonderful time."

Mrs. Nixon had one semicomic chance to leave the hustle and bustle for calmer surroundings. While Nixon was detained by newsmen, Pat moved to the front of the terminal. A porter, ever alert, said, "Hey, you call a cab?" She hadn't.

Nixon, meanwhile, was still in the terminal building, where two women (obviously American tourists) raced up to shake hands. One said, "I wish you were in the White House," while the second capped a hearty handshake with the words. "I voted for you."

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