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import streamlit as st
import pandas as pd
import numpy as np
import plotly.express as px
def calculate_present_value(cash_flows, discount_rate):
years = np.arange(1, len(cash_flows)+1)
present_values = cash_flows / (1 + discount_rate) ** years
return np.sum(present_values)
st.title('PV calc')
# Input cash flows
st.subheader('Ingresar los Cash Flows 10 años:')
cash_flows = []
for i in range(1, 11):
cash_flow = st.number_input(f"Cash Flow para el Año {i}:", value=10000.0, step=1000.0, format="%.2f")
cash_flows.append(cash_flow)
# tasa
discount_rate = st.number_input('Ingrese la tasa de descuento (ejemplo: 0.05 para 5%):', value=0.05, step=0.01, format="%.2f")
if st.button('Calcular Valor Presente'):
cash_flows = np.array(cash_flows)
pv = calculate_present_value(cash_flows, discount_rate)
st.success(f"El valor presente calculado es: ${pv:,.2f}")
df = pd.DataFrame({
'Año': np.arange(1, 11),
'Cash Flow': cash_flows
})
fig = px.scatter(df, x='Año', y='Cash Flow', title="Cash Flows vs. Tiempo", labels={'Cash Flow': 'Cash Flow ($)', 'Año': 'Año'})
st.plotly_chart(fig) |